21001120110102 has 32 divisors (see below), whose sum is σ = 48232237576320. Its totient is φ = 6029029696320.

The previous prime is 21001120110073. The next prime is 21001120110127. The reversal of 21001120110102 is 20101102110012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8373651103 + ... + 8373653610.

It is an arithmetic number, because the mean of its divisors is an integer number (1507257424260).

Almost surely, 2^{21001120110102} is an apocalyptic number.

21001120110102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21001120110102 is an abundant number, since it is smaller than the sum of its proper divisors (27231117466218).

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

21001120110102 is a wasteful number, since it uses less digits than its factorization.

21001120110102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16747304748.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21001120110102 its reverse (20101102110012), we get a palindrome (41102222220114).

The spelling of 21001120110102 in words is "twenty-one trillion, one billion, one hundred twenty million, one hundred ten thousand, one hundred two".