21112012102 has 16 divisors (see below), whose sum is σ = 31930818192. Its totient is φ = 10468768000.

The previous prime is 21112012069. The next prime is 21112012147. The reversal of 21112012102 is 20121021112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26718 + ... + 207214.

It is an arithmetic number, because the mean of its divisors is an integer number (1995676137).

Almost surely, 2^21112012102 is an apocalyptic number.

21112012102 is a deficient number, since it is larger than the sum of its proper divisors (10818806090).

21112012102 is a wasteful number, since it uses less digits than its factorization.

21112012102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180983.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21112012102 its reverse (20121021112), we get a palindrome (41233033214).

The spelling of 21112012102 in words is "twenty-one billion, one hundred twelve million, twelve thousand, one hundred two".