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123130222321 = 235353487927
BaseRepresentation
bin111001010101100100…
…0100001011011110001
3102202211011020101021111
41302223020201123301
54004132314103241
6132322031553321
711616165423001
oct1625310413361
9382734211244
10123130222321
1148245889517
121ba4408b841
13b7c3864622
145d60d6a001
153309bbdc81
hex1cab2216f1

123130222321 has 4 divisors (see below), whose sum is σ = 128483710272. Its totient is φ = 117776734372.

The previous prime is 123130222307. The next prime is 123130222333. The reversal of 123130222321 is 123222031321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123130222321 - 223 = 123121833713 is a prime.

It is a super-2 number, since 2×1231302223212 (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123130222292 and 123130222301.

It is not an unprimeable number, because it can be changed into a prime (123130222381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2676743941 + ... + 2676743986.

It is an arithmetic number, because the mean of its divisors is an integer number (32120927568).

Almost surely, 2123130222321 is an apocalyptic number.

It is an amenable number.

123130222321 is a deficient number, since it is larger than the sum of its proper divisors (5353487951).

123130222321 is an equidigital number, since it uses as much as digits as its factorization.

123130222321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5353487950.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 123130222321 its reverse (123222031321), we get a palindrome (246352253642).

The spelling of 123130222321 in words is "one hundred twenty-three billion, one hundred thirty million, two hundred twenty-two thousand, three hundred twenty-one".

Divisors: 1 23 5353487927 123130222321