31011031133321 has 4 divisors (see below), whose sum is σ = 32080377034500. Its totient is φ = 29941685232144.

The previous prime is 31011031133309. The next prime is 31011031133363. The reversal of 31011031133321 is 12333113011013.

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 14813915743225 + 16197115390096 = 3848885^2 + 4024564^2 .

It is a cyclic number.

It is not a de Polignac number, because 31011031133321 - 2³⁴ = 30993851264137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31011031135321) 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, 534672950546 + ... + 534672950603.

It is an arithmetic number, because the mean of its divisors is an integer number (8020094258625).

Almost surely, 2^{31011031133321} is an apocalyptic number.

It is an amenable number.

31011031133321 is a deficient number, since it is larger than the sum of its proper divisors (1069345901179).

31011031133321 is a wasteful number, since it uses less digits than its factorization.

31011031133321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069345901178.

The product of its (nonzero) digits is 486, while the sum is 23.

Adding to 31011031133321 its reverse (12333113011013), we get a palindrome (43344144144334).

The spelling of 31011031133321 in words is "thirty-one trillion, eleven billion, thirty-one million, one hundred thirty-three thousand, three hundred twenty-one".