21020311210112 has 32 divisors (see below), whose sum is σ = 41877240404880. Its totient is φ = 10509944990976.

The previous prime is 21020311210091. The next prime is 21020311210187. The reversal of 21020311210112 is 21101211302012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×21020311210112² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4867343 + ... + 8107505.

Almost surely, 2^{21020311210112} is an apocalyptic number.

It is an amenable number.

21020311210112 is a deficient number, since it is larger than the sum of its proper divisors (20856929194768).

21020311210112 is an equidigital number, since it uses as much as digits as its factorization.

21020311210112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3290860 (or 3290848 counting only the distinct ones).

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

Adding to 21020311210112 its reverse (21101211302012), we get a palindrome (42121522512124).

The spelling of 21020311210112 in words is "twenty-one trillion, twenty billion, three hundred eleven million, two hundred ten thousand, one hundred twelve".