31112122011 has 16 divisors (see below), whose sum is σ = 43706697216. Its totient is φ = 19646991936.

The previous prime is 31112122001. The next prime is 31112122141. The reversal of 31112122011 is 11022121113.

It is not a de Polignac number, because 31112122011 - 2⁵ = 31112121979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31112122001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2181730 + ... + 2195943.

It is an arithmetic number, because the mean of its divisors is an integer number (2731668576).

Almost surely, 2^31112122011 is an apocalyptic number.

31112122011 is a deficient number, since it is larger than the sum of its proper divisors (12594575205).

31112122011 is a wasteful number, since it uses less digits than its factorization.

31112122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4377802.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 31112122011 its reverse (11022121113), we get a palindrome (42134243124).

The spelling of 31112122011 in words is "thirty-one billion, one hundred twelve million, one hundred twenty-two thousand, eleven".