311431032020421 has 8 divisors (see below), whose sum is σ = 461379306696960. Its totient is φ = 207620688013596.

The previous prime is 311431032020399. The next prime is 311431032020431. The reversal of 311431032020421 is 124020230134113.

311431032020421 is a `hidden beast` number, since 3 + 1 + 1 + 4 + 31 + 0 + 3 + 202 + 0 + 421 = 666.

It is not a de Polignac number, because 311431032020421 - 2⁷ = 311431032020293 is a prime.

It is a super-2 number, since 2×311431032020421² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 11534482667423 = 311431032020421 / (3 + 1 + 1 + 4 + 3 + 1 + 0 + 3 + 2 + 0 + 2 + 0 + 4 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311431032020431) 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 7 ways as a sum of consecutive naturals, for example, 5767241333685 + ... + 5767241333738.

It is an arithmetic number, because the mean of its divisors is an integer number (57672413337120).

Almost surely, 2^{311431032020421} is an apocalyptic number.

It is an amenable number.

311431032020421 is a deficient number, since it is larger than the sum of its proper divisors (149948274676539).

311431032020421 is a wasteful number, since it uses less digits than its factorization.

311431032020421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11534482667432 (or 11534482667426 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 311431032020421 its reverse (124020230134113), we get a palindrome (435451262154534).

The spelling of 311431032020421 in words is "three hundred eleven trillion, four hundred thirty-one billion, thirty-two million, twenty thousand, four hundred twenty-one".