31120220332011 has 16 divisors (see below), whose sum is σ = 41887663488000. Its totient is φ = 20549853194208.

The previous prime is 31120220331979. The next prime is 31120220332049. The reversal of 31120220332011 is 11023302202113.

It is not a de Polignac number, because 31120220332011 - 2⁵ = 31120220331979 is a prime.

It is a super-2 number, since 2×31120220332011² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31120220336011) 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, 5071611 + ... + 9378788.

It is an arithmetic number, because the mean of its divisors is an integer number (2617978968000).

Almost surely, 2^{31120220332011} is an apocalyptic number.

31120220332011 is a deficient number, since it is larger than the sum of its proper divisors (10767443155989).

31120220332011 is a wasteful number, since it uses less digits than its factorization.

31120220332011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14457218.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31120220332011 its reverse (11023302202113), we get a palindrome (42143522534124).

The spelling of 31120220332011 in words is "thirty-one trillion, one hundred twenty billion, two hundred twenty million, three hundred thirty-two thousand, eleven".