31120000002 has 96 divisors (see below), whose sum is σ = 83120943360. Its totient is φ = 8194193280.

The previous prime is 31119999991. The next prime is 31120000007. The reversal of 31120000002 is 20000002113.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (31120000007) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1018524 + ... + 1048632.

It is an arithmetic number, because the mean of its divisors is an integer number (865843160).

Almost surely, 2^31120000002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31120000002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41560471680).

31120000002 is an abundant number, since it is smaller than the sum of its proper divisors (52000943358).

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

31120000002 is a wasteful number, since it uses less digits than its factorization.

31120000002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30768 (or 30765 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 31120000002 its reverse (20000002113), we get a palindrome (51120002115).

The spelling of 31120000002 in words is "thirty-one billion, one hundred twenty million, two", and thus it is an aban number.