31003000120 has 32 divisors (see below), whose sum is σ = 70061385600. Its totient is φ = 12347042688.

The previous prime is 31003000117. The next prime is 31003000163. The reversal of 31003000120 is 2100030013.

It is a super-2 number, since 2×31003000120² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 31003000097 and 31003000106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1683144 + ... + 1701463.

It is an arithmetic number, because the mean of its divisors is an integer number (2189418300).

Almost surely, 2^31003000120 is an apocalyptic number.

It is an amenable number.

31003000120 is an abundant number, since it is smaller than the sum of its proper divisors (39058385480).

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

31003000120 is a wasteful number, since it uses less digits than its factorization.

31003000120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3384847 (or 3384843 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 10.

Adding to 31003000120 its reverse (2100030013), we get a palindrome (33103030133).

The spelling of 31003000120 in words is "thirty-one billion, three million, one hundred twenty", and thus it is an aban number.