31021131133 has 8 divisors (see below), whose sum is σ = 32696314200. Its totient is φ = 29386314048.

The previous prime is 31021131131. The next prime is 31021131161. The reversal of 31021131133 is 33113112013.

It can be written as a sum of positive squares in 4 ways, for example, as 14256837604 + 16764293529 = 119402^2 + 129477^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 31021131133 - 2¹ = 31021131131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31021131133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31021131131) 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, 10089918 + ... + 10092991.

It is an arithmetic number, because the mean of its divisors is an integer number (4087039275).

Almost surely, 2^31021131133 is an apocalyptic number.

It is an amenable number.

31021131133 is a deficient number, since it is larger than the sum of its proper divisors (1675183067).

31021131133 is a wasteful number, since it uses less digits than its factorization.

31021131133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20182991.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 31021131133 its reverse (33113112013), we get a palindrome (64134243146).

The spelling of 31021131133 in words is "thirty-one billion, twenty-one million, one hundred thirty-one thousand, one hundred thirty-three".