311200012123 has 64 divisors (see below), whose sum is σ = 428816553984. Its totient is φ = 218028672000.

The previous prime is 311200012099. The next prime is 311200012169. The reversal of 311200012123 is 321210002113.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311200012123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311200012097 and 311200012106.

It is not an unprimeable number, because it can be changed into a prime (311200012423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6264543 + ... + 6314023.

It is an arithmetic number, because the mean of its divisors is an integer number (6700258656).

Almost surely, 2^311200012123 is an apocalyptic number.

311200012123 is a deficient number, since it is larger than the sum of its proper divisors (117616541861).

311200012123 is a wasteful number, since it uses less digits than its factorization.

311200012123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49676.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 311200012123 its reverse (321210002113), we get a palindrome (632410014236).

The spelling of 311200012123 in words is "three hundred eleven billion, two hundred million, twelve thousand, one hundred twenty-three".