21020211100110 has 64 divisors (see below), whose sum is σ = 52077373286400. Its totient is φ = 5424414829440.

The previous prime is 21020211100069. The next prime is 21020211100117. The reversal of 21020211100110 is 1100111202012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020211100117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34032316 + ... + 34644464.

It is an arithmetic number, because the mean of its divisors is an integer number (813708957600).

Almost surely, 2^{21020211100110} is an apocalyptic number.

21020211100110 is an abundant number, since it is smaller than the sum of its proper divisors (31057162186290).

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

21020211100110 is a wasteful number, since it uses less digits than its factorization.

21020211100110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649113.

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

Adding to 21020211100110 its reverse (1100111202012), we get a palindrome (22120322302122).

The spelling of 21020211100110 in words is "twenty-one trillion, twenty billion, two hundred eleven million, one hundred thousand, one hundred ten".