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1230232320221 = 2455215010701
BaseRepresentation
bin10001111001101111100…
…011110111100011011101
311100121110000011002210012
4101321233203313203131
5130124003433221341
62341054432053005
7154611206120222
oct21715743674335
94317400132705
101230232320221
11434814088803
1217a516394165
138c019b42198
1443787769949
1522003e050eb
hex11e6f8f78dd

1230232320221 has 4 divisors (see below), whose sum is σ = 1230237576444. Its totient is φ = 1230227064000.

The previous prime is 1230232320193. The next prime is 1230232320257. The reversal of 1230232320221 is 1220232320321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 865886080900 + 364346239321 = 930530^2 + 603611^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1230232320221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230235320221) 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, 2259830 + ... + 2750871.

It is an arithmetic number, because the mean of its divisors is an integer number (307559394111).

Almost surely, 21230232320221 is an apocalyptic number.

It is an amenable number.

1230232320221 is a deficient number, since it is larger than the sum of its proper divisors (5256223).

1230232320221 is an equidigital number, since it uses as much as digits as its factorization.

1230232320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5256222.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 1230232320221 its reverse (1220232320321), we get a palindrome (2450464640542).

The spelling of 1230232320221 in words is "one trillion, two hundred thirty billion, two hundred thirty-two million, three hundred twenty thousand, two hundred twenty-one".

Divisors: 1 245521 5010701 1230232320221