2112210021021 has 16 divisors (see below), whose sum is σ = 2818836325440. Its totient is φ = 1406862063360.

The previous prime is 2112210021013. The next prime is 2112210021023. The reversal of 2112210021021 is 1201200122112.

It is not a de Polignac number, because 2112210021021 - 2³ = 2112210021013 is a prime.

It is a super-2 number, since 2×2112210021021² (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 (2112210021023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81795450 + ... + 81821268.

It is an arithmetic number, because the mean of its divisors is an integer number (176177270340).

Almost surely, 2^{2112210021021} is an apocalyptic number.

It is an amenable number.

2112210021021 is a deficient number, since it is larger than the sum of its proper divisors (706626304419).

2112210021021 is a wasteful number, since it uses less digits than its factorization.

2112210021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49516.

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

Adding to 2112210021021 its reverse (1201200122112), we get a palindrome (3313410143133).

The spelling of 2112210021021 in words is "two trillion, one hundred twelve billion, two hundred ten million, twenty-one thousand, twenty-one".