212001021931 has 2 divisors, whose sum is σ = 212001021932. Its totient is φ = 212001021930.

The previous prime is 212001021877. The next prime is 212001021959. The reversal of 212001021931 is 139120100212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212001021931 - 2¹⁵ = 212000989163 is a prime.

It is a super-2 number, since 2×212001021931² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212001021961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106000510965 + 106000510966.

It is an arithmetic number, because the mean of its divisors is an integer number (106000510966).

Almost surely, 2^212001021931 is an apocalyptic number.

212001021931 is a deficient number, since it is larger than the sum of its proper divisors (1).

212001021931 is an equidigital number, since it uses as much as digits as its factorization.

212001021931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 212001021931 in words is "two hundred twelve billion, one million, twenty-one thousand, nine hundred thirty-one".