1021012122112 has 40 divisors (see below), whose sum is σ = 2060228501892. Its totient is φ = 505451520000.

The previous prime is 1021012122107. The next prime is 1021012122113. The reversal of 1021012122112 is 2112212101201.

It can be written as a sum of positive squares in 2 ways, for example, as 852859638016 + 168152484096 = 923504^2 + 410064^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1021012122113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9820389 + ... + 9923812.

Almost surely, 2^{1021012122112} is an apocalyptic number.

It is an amenable number.

1021012122112 is an abundant number, since it is smaller than the sum of its proper divisors (1039216379780).

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

1021012122112 is an equidigital number, since it uses as much as digits as its factorization.

1021012122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19744320 (or 19744304 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1021012122112 its reverse (2112212101201), we get a palindrome (3133224223313).

The spelling of 1021012122112 in words is "one trillion, twenty-one billion, twelve million, one hundred twenty-two thousand, one hundred twelve".