31001103120 has 120 divisors (see below), whose sum is σ = 104064785856. Its totient is φ = 7631030784.

The previous prime is 31001103109. The next prime is 31001103149. The reversal of 31001103120 is 2130110013.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×31001103120² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 31001103096 and 31001103105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 341604 + ... + 422723.

Almost surely, 2^31001103120 is an apocalyptic number.

31001103120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31001103120 is an abundant number, since it is smaller than the sum of its proper divisors (73063682736).

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

31001103120 is a wasteful number, since it uses less digits than its factorization.

31001103120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764369 (or 764350 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 31001103120 its reverse (2130110013), we get a palindrome (33131213133).

The spelling of 31001103120 in words is "thirty-one billion, one million, one hundred three thousand, one hundred twenty".