30003131312123 has 4 divisors (see below), whose sum is σ = 30068214026928. Its totient is φ = 29938048597320.

The previous prime is 30003131312029. The next prime is 30003131312173. The reversal of 30003131312123 is 32121313130003.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30003131312123 is a prime.

It is a super-2 number, since 2×30003131312123² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30003131312173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32541356711 + ... + 32541357632.

It is an arithmetic number, because the mean of its divisors is an integer number (7517053506732).

Almost surely, 2^{30003131312123} is an apocalyptic number.

30003131312123 is a deficient number, since it is larger than the sum of its proper divisors (65082714805).

30003131312123 is an equidigital number, since it uses as much as digits as its factorization.

30003131312123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65082714804.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 30003131312123 its reverse (32121313130003), we get a palindrome (62124444442126).

The spelling of 30003131312123 in words is "thirty trillion, three billion, one hundred thirty-one million, three hundred twelve thousand, one hundred twenty-three".