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122130221 = 607201203
BaseRepresentation
bin1110100011110…
…00111100101101
322111210212011112
413101320330231
5222231131341
620041401405
73012042533
oct721707455
9274725145
10122130221
1162a37274
1234a99265
131c3c1705
1412312153
15aac6aeb
hex7478f2d

122130221 has 4 divisors (see below), whose sum is σ = 122332032. Its totient is φ = 121928412.

The previous prime is 122130199. The next prime is 122130251. The reversal of 122130221 is 122031221.

It is a happy number.

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 122130221 - 210 = 122129197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122130196 and 122130205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122130251) 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, 99995 + ... + 101208.

It is an arithmetic number, because the mean of its divisors is an integer number (30583008).

Almost surely, 2122130221 is an apocalyptic number.

It is an amenable number.

122130221 is a deficient number, since it is larger than the sum of its proper divisors (201811).

122130221 is an equidigital number, since it uses as much as digits as its factorization.

122130221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201810.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 122130221 is about 11051.2542727059. The cubic root of 122130221 is about 496.1439664578.

Adding to 122130221 its reverse (122031221), we get a palindrome (244161442).

The spelling of 122130221 in words is "one hundred twenty-two million, one hundred thirty thousand, two hundred twenty-one".

Divisors: 1 607 201203 122130221