321420023431031 has 32 divisors (see below), whose sum is σ = 376356336000000. Its totient is φ = 274386115465056.

The previous prime is 321420023431027. The next prime is 321420023431057. The reversal of 321420023431031 is 130134320024123.

It is not a de Polignac number, because 321420023431031 - 2² = 321420023431027 is a prime.

It is a super-2 number, since 2×321420023431031² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321420023430985 and 321420023431003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321420023451031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81425405 + ... + 85281513.

It is an arithmetic number, because the mean of its divisors is an integer number (11761135500000).

Almost surely, 2^{321420023431031} is an apocalyptic number.

321420023431031 is a deficient number, since it is larger than the sum of its proper divisors (54936312568969).

321420023431031 is an equidigital number, since it uses as much as digits as its factorization.

321420023431031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3857116 (or 3857102 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 321420023431031 its reverse (130134320024123), we get a palindrome (451554343455154).

The spelling of 321420023431031 in words is "three hundred twenty-one trillion, four hundred twenty billion, twenty-three million, four hundred thirty-one thousand, thirty-one".