212013121031 has 2 divisors, whose sum is σ = 212013121032. Its totient is φ = 212013121030.

The previous prime is 212013121027. The next prime is 212013121093. The reversal of 212013121031 is 130121310212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212013121031 - 2² = 212013121027 is a prime.

It is a super-2 number, since 2×212013121031² (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 (212013121531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106006560515 + 106006560516.

It is an arithmetic number, because the mean of its divisors is an integer number (106006560516).

Almost surely, 2^212013121031 is an apocalyptic number.

212013121031 is a deficient number, since it is larger than the sum of its proper divisors (1).

212013121031 is an equidigital number, since it uses as much as digits as its factorization.

212013121031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 212013121031 its reverse (130121310212), we get a palindrome (342134431243).

The spelling of 212013121031 in words is "two hundred twelve billion, thirteen million, one hundred twenty-one thousand, thirty-one".