21130122102 has 64 divisors (see below), whose sum is σ = 44894158848. Its totient is φ = 6619860000.

The previous prime is 21130122043. The next prime is 21130122109. The reversal of 21130122102 is 20122103112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130122109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1135977 + ... + 1154427.

It is an arithmetic number, because the mean of its divisors is an integer number (701471232).

Almost surely, 2^21130122102 is an apocalyptic number.

21130122102 is an abundant number, since it is smaller than the sum of its proper divisors (23764036746).

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

21130122102 is a wasteful number, since it uses less digits than its factorization.

21130122102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18665.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21130122102 its reverse (20122103112), we get a palindrome (41252225214).

The spelling of 21130122102 in words is "twenty-one billion, one hundred thirty million, one hundred twenty-two thousand, one hundred two".