31133021189 has 2 divisors, whose sum is σ = 31133021190. Its totient is φ = 31133021188.

The previous prime is 31133021167. The next prime is 31133021233. The reversal of 31133021189 is 98112033113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26774776900 + 4358244289 = 163630^2 + 66017^2 .

It is a cyclic number.

It is not a de Polignac number, because 31133021189 - 2²⁴ = 31116243973 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31133021489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15566510594 + 15566510595.

It is an arithmetic number, because the mean of its divisors is an integer number (15566510595).

Almost surely, 2^31133021189 is an apocalyptic number.

It is an amenable number.

31133021189 is a deficient number, since it is larger than the sum of its proper divisors (1).

31133021189 is an equidigital number, since it uses as much as digits as its factorization.

31133021189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The spelling of 31133021189 in words is "thirty-one billion, one hundred thirty-three million, twenty-one thousand, one hundred eighty-nine".