212431015331 has 2 divisors, whose sum is σ = 212431015332. Its totient is φ = 212431015330.

The previous prime is 212431015327. The next prime is 212431015333. The reversal of 212431015331 is 133510134212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212431015331 - 2² = 212431015327 is a prime.

It is a super-2 number, since 2×212431015331² (a number of 23 digits) contains 22 as substring.

Together with 212431015333, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212431015331.

It is not a weakly prime, because it can be changed into another prime (212431015333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106215507665 + 106215507666.

It is an arithmetic number, because the mean of its divisors is an integer number (106215507666).

Almost surely, 2^212431015331 is an apocalyptic number.

212431015331 is a deficient number, since it is larger than the sum of its proper divisors (1).

212431015331 is an equidigital number, since it uses as much as digits as its factorization.

212431015331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 212431015331 its reverse (133510134212), we get a palindrome (345941149543).

The spelling of 212431015331 in words is "two hundred twelve billion, four hundred thirty-one million, fifteen thousand, three hundred thirty-one".