212321132220123 has 12 divisors (see below), whose sum is σ = 308892454550680. Its totient is φ = 140529094706016.

The previous prime is 212321132220061. The next prime is 212321132220157. The reversal of 212321132220123 is 321022231123212.

212321132220123 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 211 + 322 + 2 + 0 + 123 = 666.

It is not a de Polignac number, because 212321132220123 - 2⁹ = 212321132219611 is a prime.

It is a super-2 number, since 2×212321132220123² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212321132220823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84860563186 + ... + 84860565687.

Almost surely, 2^{212321132220123} is an apocalyptic number.

212321132220123 is a deficient number, since it is larger than the sum of its proper divisors (96571322330557).

212321132220123 is a wasteful number, since it uses less digits than its factorization.

212321132220123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169721129018 (or 169721129015 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 212321132220123 its reverse (321022231123212), we get a palindrome (533343363343335).

The spelling of 212321132220123 in words is "two hundred twelve trillion, three hundred twenty-one billion, one hundred thirty-two million, two hundred twenty thousand, one hundred twenty-three".