31111220004 has 48 divisors (see below), whose sum is σ = 74405350656. Its totient is φ = 10111763200.

The previous prime is 31111219991. The next prime is 31111220029. The reversal of 31111220004 is 40002211113.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 903634 + ... + 937430.

It is an arithmetic number, because the mean of its divisors is an integer number (1550111472).

Almost surely, 2^31111220004 is an apocalyptic number.

It is an amenable number.

31111220004 is an abundant number, since it is smaller than the sum of its proper divisors (43294130652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31111220004 is a wasteful number, since it uses less digits than its factorization.

31111220004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35716 (or 35714 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 31111220004 its reverse (40002211113), we get a palindrome (71113431117).

The spelling of 31111220004 in words is "thirty-one billion, one hundred eleven million, two hundred twenty thousand, four".