31203120030 has 16 divisors (see below), whose sum is σ = 74887488144. Its totient is φ = 8320832000.

The previous prime is 31203120017. The next prime is 31203120041. The reversal of 31203120030 is 3002130213.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 31203119991 and 31203120009.

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, 520051971 + ... + 520052030.

It is an arithmetic number, because the mean of its divisors is an integer number (4680468009).

Almost surely, 2^31203120030 is an apocalyptic number.

31203120030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31203120030 is an abundant number, since it is smaller than the sum of its proper divisors (43684368114).

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

31203120030 is a wasteful number, since it uses less digits than its factorization.

31203120030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040104011.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 31203120030 its reverse (3002130213), we get a palindrome (34205250243).

The spelling of 31203120030 in words is "thirty-one billion, two hundred three million, one hundred twenty thousand, thirty".