31113111100 has 36 divisors (see below), whose sum is σ = 69843576600. Its totient is φ = 12016096960.

The previous prime is 31113111053. The next prime is 31113111101. The reversal of 31113111100 is 111131113.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113111101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5361430 + ... + 5367229.

It is an arithmetic number, because the mean of its divisors is an integer number (1940099350).

Almost surely, 2^31113111100 is an apocalyptic number.

It is an amenable number.

31113111100 is an abundant number, since it is smaller than the sum of its proper divisors (38730465500).

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

31113111100 is a wasteful number, since it uses less digits than its factorization.

31113111100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10728702 (or 10728695 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 13.

Adding to 31113111100 its reverse (111131113), we get a palindrome (31224242213).

The spelling of 31113111100 in words is "thirty-one billion, one hundred thirteen million, one hundred eleven thousand, one hundred".