2112012210021 has 32 divisors (see below), whose sum is σ = 3415149803520. Its totient is φ = 1134825789504.

The previous prime is 2112012210017. The next prime is 2112012210031. The reversal of 2112012210021 is 1200122102112.

It is not a de Polignac number, because 2112012210021 - 2² = 2112012210017 is a prime.

It is a super-2 number, since 2×2112012210021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112012210031) 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, 37028250 + ... + 37085243.

It is an arithmetic number, because the mean of its divisors is an integer number (106723431360).

Almost surely, 2^{2112012210021} is an apocalyptic number.

2112012210021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2112012210021 is a deficient number, since it is larger than the sum of its proper divisors (1303137593499).

2112012210021 is a wasteful number, since it uses less digits than its factorization.

2112012210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74113585.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2112012210021 its reverse (1200122102112), we get a palindrome (3312134312133).

The spelling of 2112012210021 in words is "two trillion, one hundred twelve billion, twelve million, two hundred ten thousand, twenty-one".