212231102121021 has 32 divisors (see below), whose sum is σ = 286671769325568. Its totient is φ = 139650498247680.

The previous prime is 212231102120941. The next prime is 212231102121029. The reversal of 212231102121021 is 120121201132212.

212231102121021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212231102121021 - 2¹⁸ = 212231101858877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212231102121029) 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, 1097311701 + ... + 1097505093.

It is an arithmetic number, because the mean of its divisors is an integer number (8958492791424).

Almost surely, 2^{212231102121021} is an apocalyptic number.

It is an amenable number.

212231102121021 is a deficient number, since it is larger than the sum of its proper divisors (74440667204547).

212231102121021 is a wasteful number, since it uses less digits than its factorization.

212231102121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208341.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 212231102121021 its reverse (120121201132212), we get a palindrome (332352303253233).

The spelling of 212231102121021 in words is "two hundred twelve trillion, two hundred thirty-one billion, one hundred two million, one hundred twenty-one thousand, twenty-one".