21120020110102 has 16 divisors (see below), whose sum is σ = 32128270230672. Its totient is φ = 10410725232000.

The previous prime is 21120020110097. The next prime is 21120020110103. The reversal of 21120020110102 is 20101102002112.

It is a super-2 number, since 2×21120020110102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120020110103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31803223 + ... + 32460514.

It is an arithmetic number, because the mean of its divisors is an integer number (2008016889417).

Almost surely, 2^{21120020110102} is an apocalyptic number.

21120020110102 is a deficient number, since it is larger than the sum of its proper divisors (11008250120570).

21120020110102 is a wasteful number, since it uses less digits than its factorization.

21120020110102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64266063.

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

Adding to 21120020110102 its reverse (20101102002112), we get a palindrome (41221122112214).

The spelling of 21120020110102 in words is "twenty-one trillion, one hundred twenty billion, twenty million, one hundred ten thousand, one hundred two".