2112212010021 has 64 divisors (see below), whose sum is σ = 3085680476160. Its totient is φ = 1280257920000.

The previous prime is 2112212010019. The next prime is 2112212010031. The reversal of 2112212010021 is 1200102122112.

It is not a de Polignac number, because 2112212010021 - 2¹ = 2112212010019 is a prime.

It is a super-2 number, since 2×2112212010021² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112212010001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 122573476 + ... + 122590706.

It is an arithmetic number, because the mean of its divisors is an integer number (48213757440).

Almost surely, 2^{2112212010021} is an apocalyptic number.

It is an amenable number.

2112212010021 is a deficient number, since it is larger than the sum of its proper divisors (973468466139).

2112212010021 is a wasteful number, since it uses less digits than its factorization.

2112212010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17858.

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

Adding to 2112212010021 its reverse (1200102122112), we get a palindrome (3312314132133).

The spelling of 2112212010021 in words is "two trillion, one hundred twelve billion, two hundred twelve million, ten thousand, twenty-one".