31120012220011 has 32 divisors (see below), whose sum is σ = 37305424836288. Its totient is φ = 25584114915840.

The previous prime is 31120012219991. The next prime is 31120012220039. The reversal of 31120012220011 is 11002221002113.

It is not a de Polignac number, because 31120012220011 - 2³⁵ = 31085652481643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31120012220071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2098425 + ... + 8163541.

It is an arithmetic number, because the mean of its divisors is an integer number (1165794526134).

Almost surely, 2^{31120012220011} is an apocalyptic number.

31120012220011 is a deficient number, since it is larger than the sum of its proper divisors (6185412616277).

31120012220011 is a wasteful number, since it uses less digits than its factorization.

31120012220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6065871.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 31120012220011 its reverse (11002221002113), we get a palindrome (42122233222124).

The spelling of 31120012220011 in words is "thirty-one trillion, one hundred twenty billion, twelve million, two hundred twenty thousand, eleven".