21012020110210 has 32 divisors (see below), whose sum is σ = 38780030722752. Its totient is φ = 8192627661120.

The previous prime is 21012020110157. The next prime is 21012020110219. The reversal of 21012020110210 is 1201102021012.

It is a super-2 number, since 2×21012020110210² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21012020110219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49549729 + ... + 49971988.

It is an arithmetic number, because the mean of its divisors is an integer number (1211875960086).

Almost surely, 2^{21012020110210} is an apocalyptic number.

21012020110210 is a deficient number, since it is larger than the sum of its proper divisors (17768010612542).

21012020110210 is a wasteful number, since it uses less digits than its factorization.

21012020110210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99522258.

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

Adding to 21012020110210 its reverse (1201102021012), we get a palindrome (22213122131222).

The spelling of 21012020110210 in words is "twenty-one trillion, twelve billion, twenty million, one hundred ten thousand, two hundred ten".