21112002102 has 16 divisors (see below), whose sum is σ = 42424120512. Its totient is φ = 7003981320.

The previous prime is 21112002097. The next prime is 21112002173. The reversal of 21112002102 is 20120021112.

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, 8336808 + ... + 8339339.

It is an arithmetic number, because the mean of its divisors is an integer number (2651507532).

Almost surely, 2^21112002102 is an apocalyptic number.

21112002102 is an abundant number, since it is smaller than the sum of its proper divisors (21312118410).

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

21112002102 is a wasteful number, since it uses less digits than its factorization.

21112002102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16676363.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21112002102 its reverse (20120021112), we get a palindrome (41232023214).

The spelling of 21112002102 in words is "twenty-one billion, one hundred twelve million, two thousand, one hundred two".