212312213031 has 4 divisors (see below), whose sum is σ = 283082950712. Its totient is φ = 141541475352.

The previous prime is 212312212999. The next prime is 212312213059. The reversal of 212312213031 is 130312213212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 212312213031 - 2⁵ = 212312212999 is a prime.

It is a super-2 number, since 2×212312213031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212312212989 and 212312213007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212312214031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35385368836 + ... + 35385368841.

It is an arithmetic number, because the mean of its divisors is an integer number (70770737678).

Almost surely, 2^212312213031 is an apocalyptic number.

212312213031 is a deficient number, since it is larger than the sum of its proper divisors (70770737681).

212312213031 is an equidigital number, since it uses as much as digits as its factorization.

212312213031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70770737680.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 212312213031 its reverse (130312213212), we get a palindrome (342624426243).

The spelling of 212312213031 in words is "two hundred twelve billion, three hundred twelve million, two hundred thirteen thousand, thirty-one".