31133221023 has 8 divisors (see below), whose sum is σ = 41586851968. Its totient is φ = 20717535384.

The previous prime is 31133221003. The next prime is 31133221037. The reversal of 31133221023 is 32012233113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31133221023 - 2¹² = 31133216927 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 (31133221003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9484411 + ... + 9487692.

It is an arithmetic number, because the mean of its divisors is an integer number (5198356496).

Almost surely, 2^31133221023 is an apocalyptic number.

31133221023 is a deficient number, since it is larger than the sum of its proper divisors (10453630945).

31133221023 is a wasteful number, since it uses less digits than its factorization.

31133221023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18972653.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31133221023 its reverse (32012233113), we get a palindrome (63145454136).

The spelling of 31133221023 in words is "thirty-one billion, one hundred thirty-three million, two hundred twenty-one thousand, twenty-three".