30311320123 has 16 divisors (see below), whose sum is σ = 35007546816. Its totient is φ = 25707386880.

The previous prime is 30311320087. The next prime is 30311320157. The reversal of 30311320123 is 32102311303.

It is a de Polignac number, because none of the positive numbers 2^k-30311320123 is a prime.

It is a super-2 number, since 2×30311320123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30311320123.

It is not an unprimeable number, because it can be changed into a prime (30311320723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 436753 + ... + 501373.

It is an arithmetic number, because the mean of its divisors is an integer number (2187971676).

Almost surely, 2^30311320123 is an apocalyptic number.

30311320123 is a deficient number, since it is larger than the sum of its proper divisors (4696226693).

30311320123 is a wasteful number, since it uses less digits than its factorization.

30311320123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65334.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 30311320123 its reverse (32102311303), we get a palindrome (62413631426).

The spelling of 30311320123 in words is "thirty billion, three hundred eleven million, three hundred twenty thousand, one hundred twenty-three".