31212313033 has 4 divisors (see below), whose sum is σ = 34049796048. Its totient is φ = 28374830020.

The previous prime is 31212313003. The next prime is 31212313037. The reversal of 31212313033 is 33031321213.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33031321213 = 11 ⋅3002847383.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31212313033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31212312995 and 31212313013.

It is not an unprimeable number, because it can be changed into a prime (31212313037) 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, 1418741491 + ... + 1418741512.

It is an arithmetic number, because the mean of its divisors is an integer number (8512449012).

Almost surely, 2^31212313033 is an apocalyptic number.

It is an amenable number.

31212313033 is a deficient number, since it is larger than the sum of its proper divisors (2837483015).

31212313033 is a wasteful number, since it uses less digits than its factorization.

31212313033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837483014.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31212313033 its reverse (33031321213), we get a palindrome (64243634246).

The spelling of 31212313033 in words is "thirty-one billion, two hundred twelve million, three hundred thirteen thousand, thirty-three".