21122430102 has 40 divisors (see below), whose sum is σ = 48484292472. Its totient is φ = 6869080800.

The previous prime is 21122430089. The next prime is 21122430157. The reversal of 21122430102 is 20103422112.

It is a happy number.

21122430102 is a `hidden beast` number, since 211 + 22 + 430 + 1 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1583424 + ... + 1596707.

Almost surely, 2^21122430102 is an apocalyptic number.

21122430102 is an abundant number, since it is smaller than the sum of its proper divisors (27361862370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21122430102 is a wasteful number, since it uses less digits than its factorization.

21122430102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3180186 (or 3180177 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21122430102 its reverse (20103422112), we get a palindrome (41225852214).

The spelling of 21122430102 in words is "twenty-one billion, one hundred twenty-two million, four hundred thirty thousand, one hundred two".