212313440421 has 24 divisors (see below), whose sum is σ = 313438245120. Its totient is φ = 138425364576.

The previous prime is 212313440407. The next prime is 212313440459. The reversal of 212313440421 is 124044313212.

212313440421 is a `hidden beast` number, since 2 + 1 + 231 + 3 + 4 + 4 + 0 + 421 = 666.

It is not a de Polignac number, because 212313440421 - 2²⁹ = 211776569509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212313440401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 367671 + ... + 748203.

It is an arithmetic number, because the mean of its divisors is an integer number (13059926880).

Almost surely, 2^212313440421 is an apocalyptic number.

It is an amenable number.

212313440421 is a deficient number, since it is larger than the sum of its proper divisors (101124804699).

212313440421 is a wasteful number, since it uses less digits than its factorization.

212313440421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381905 (or 381902 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 212313440421 its reverse (124044313212), we get a palindrome (336357753633).

The spelling of 212313440421 in words is "two hundred twelve billion, three hundred thirteen million, four hundred forty thousand, four hundred twenty-one".