31201212031133 has 4 divisors (see below), whose sum is σ = 31596164082240. Its totient is φ = 30806259980028.

The previous prime is 31201212031061. The next prime is 31201212031153. The reversal of 31201212031133 is 33113021210213.

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 not a de Polignac number, because 31201212031133 - 2²² = 31201207836829 is a prime.

It is a super-2 number, since 2×31201212031133² (a number of 28 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 = 31201212031099 and 31201212031108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31201212031153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197476025435 + ... + 197476025592.

It is an arithmetic number, because the mean of its divisors is an integer number (7899041020560).

Almost surely, 2^{31201212031133} is an apocalyptic number.

It is an amenable number.

31201212031133 is a deficient number, since it is larger than the sum of its proper divisors (394952051107).

31201212031133 is an equidigital number, since it uses as much as digits as its factorization.

31201212031133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394952051106.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31201212031133 its reverse (33113021210213), we get a palindrome (64314233241346).

The spelling of 31201212031133 in words is "thirty-one trillion, two hundred one billion, two hundred twelve million, thirty-one thousand, one hundred thirty-three".