212945871031 has 2 divisors, whose sum is σ = 212945871032. Its totient is φ = 212945871030.

The previous prime is 212945870993. The next prime is 212945871043. The reversal of 212945871031 is 130178549212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212945871031 - 2¹³ = 212945862839 is a prime.

It is a super-2 number, since 2×212945871031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212945871431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106472935515 + 106472935516.

It is an arithmetic number, because the mean of its divisors is an integer number (106472935516).

Almost surely, 2^212945871031 is an apocalyptic number.

212945871031 is a deficient number, since it is larger than the sum of its proper divisors (1).

212945871031 is an equidigital number, since it uses as much as digits as its factorization.

212945871031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 212945871031 in words is "two hundred twelve billion, nine hundred forty-five million, eight hundred seventy-one thousand, thirty-one".