21020213111102 has 32 divisors (see below), whose sum is σ = 31915656811584. Its totient is φ = 10382291046400.

The previous prime is 21020213111069. The next prime is 21020213111123. The reversal of 21020213111102 is 20111131202012.

It is a happy number.

It is a super-2 number, since 2×21020213111102² (a number of 27 digits) contains 22 as substring.

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, 795694598 + ... + 795721014.

It is an arithmetic number, because the mean of its divisors is an integer number (997364275362).

Almost surely, 2^{21020213111102} is an apocalyptic number.

21020213111102 is a deficient number, since it is larger than the sum of its proper divisors (10895443700482).

21020213111102 is a wasteful number, since it uses less digits than its factorization.

21020213111102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38164.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21020213111102 its reverse (20111131202012), we get a palindrome (41131344313114).

The spelling of 21020213111102 in words is "twenty-one trillion, twenty billion, two hundred thirteen million, one hundred eleven thousand, one hundred two".