31212233221213 has 4 divisors (see below), whose sum is σ = 34049708968608. Its totient is φ = 28374757473820.

The previous prime is 31212233221207. The next prime is 31212233221237.

31212233221213 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31212233221213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212233221913) 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, 1418737873681 + ... + 1418737873702.

It is an arithmetic number, because the mean of its divisors is an integer number (8512427242152).

Almost surely, 2^{31212233221213} is an apocalyptic number.

It is an amenable number.

31212233221213 is a deficient number, since it is larger than the sum of its proper divisors (2837475747395).

31212233221213 is a wasteful number, since it uses less digits than its factorization.

31212233221213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837475747394.

The product of its digits is 5184, while the sum is 28.

It can be divided in two parts, 3121223 and 3221213, that added together give a palindrome (6342436).

The spelling of 31212233221213 in words is "thirty-one trillion, two hundred twelve billion, two hundred thirty-three million, two hundred twenty-one thousand, two hundred thirteen".