31011321333445 has 4 divisors (see below), whose sum is σ = 37213585600140. Its totient is φ = 24809057066752.

The previous prime is 31011321333431. The next prime is 31011321333449. The reversal of 31011321333445 is 54433312311013.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21338431377316 + 9672889956129 = 4619354^2 + 3110127^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31011321333445 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31011321333445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31011321333449) 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, 3101132133340 + ... + 3101132133349.

It is an arithmetic number, because the mean of its divisors is an integer number (9303396400035).

Almost surely, 2^{31011321333445} is an apocalyptic number.

It is an amenable number.

31011321333445 is a deficient number, since it is larger than the sum of its proper divisors (6202264266695).

31011321333445 is an equidigital number, since it uses as much as digits as its factorization.

31011321333445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6202264266694.

The product of its (nonzero) digits is 38880, while the sum is 34.

Adding to 31011321333445 its reverse (54433312311013), we get a palindrome (85444633644458).

The spelling of 31011321333445 in words is "thirty-one trillion, eleven billion, three hundred twenty-one million, three hundred thirty-three thousand, four hundred forty-five".