31112112011 has 2 divisors, whose sum is σ = 31112112012. Its totient is φ = 31112112010.

The previous prime is 31112112007. The next prime is 31112112023. The reversal of 31112112011 is 11021121113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31112112011 - 2² = 31112112007 is a prime.

It is not a weakly prime, because it can be changed into another prime (31112112211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556056005 + 15556056006.

It is an arithmetic number, because the mean of its divisors is an integer number (15556056006).

Almost surely, 2^31112112011 is an apocalyptic number.

31112112011 is a deficient number, since it is larger than the sum of its proper divisors (1).

31112112011 is an equidigital number, since it uses as much as digits as its factorization.

31112112011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 31112112011 its reverse (11021121113), we get a palindrome (42133233124).

The spelling of 31112112011 in words is "thirty-one billion, one hundred twelve million, one hundred twelve thousand, eleven".