311431042202123 has 4 divisors (see below), whose sum is σ = 311440962631128. Its totient is φ = 311421121773120.

The previous prime is 311431042202057. The next prime is 311431042202129. The reversal of 311431042202123 is 321202240134113.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 311431042202123 - 2¹⁰ = 311431042201099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311431042202129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4960167413 + ... + 4960230198.

It is an arithmetic number, because the mean of its divisors is an integer number (77860240657782).

Almost surely, 2^{311431042202123} is an apocalyptic number.

311431042202123 is a deficient number, since it is larger than the sum of its proper divisors (9920429005).

311431042202123 is an equidigital number, since it uses as much as digits as its factorization.

311431042202123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9920429004.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 311431042202123 its reverse (321202240134113), we get a palindrome (632633282336236).

The spelling of 311431042202123 in words is "three hundred eleven trillion, four hundred thirty-one billion, forty-two million, two hundred two thousand, one hundred twenty-three".