31133012011 has 4 divisors (see below), whose sum is σ = 31312971792. Its totient is φ = 30953052232.

The previous prime is 31133011993. The next prime is 31133012021. The reversal of 31133012011 is 11021033113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11021033113 = 53 ⋅207944021.

It is a cyclic number.

It is not a de Polignac number, because 31133012011 - 2⁷ = 31133011883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31133012021) 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, 89979631 + ... + 89979976.

It is an arithmetic number, because the mean of its divisors is an integer number (7828242948).

Almost surely, 2^31133012011 is an apocalyptic number.

31133012011 is a deficient number, since it is larger than the sum of its proper divisors (179959781).

31133012011 is a wasteful number, since it uses less digits than its factorization.

31133012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179959780.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 31133012011 its reverse (11021033113), we get a palindrome (42154045124).

The spelling of 31133012011 in words is "thirty-one billion, one hundred thirty-three million, twelve thousand, eleven".