21112110001210 has 16 divisors (see below), whose sum is σ = 38002184270856. Its totient is φ = 8444758163008.

The previous prime is 21112110001153. The next prime is 21112110001223. The reversal of 21112110001210 is 1210001121112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19136311493049 + 1975798508161 = 4374507^2 + 1405631^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9691897 + ... + 11668636.

Almost surely, 2^{21112110001210} is an apocalyptic number.

21112110001210 is a deficient number, since it is larger than the sum of its proper divisors (16890074269646).

21112110001210 is a wasteful number, since it uses less digits than its factorization.

21112110001210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21459377.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21112110001210 its reverse (1210001121112), we get a palindrome (22322111122322).

The spelling of 21112110001210 in words is "twenty-one trillion, one hundred twelve billion, one hundred ten million, one thousand, two hundred ten".