321420310431021 has 6 divisors (see below), whose sum is σ = 464273781733710. Its totient is φ = 214280206954008.

The previous prime is 321420310430993. The next prime is 321420310431091. The reversal of 321420310431021 is 120134013024123.

321420310431021 is a `hidden beast` number, since 3 + 2 + 1 + 4 + 203 + 1 + 0 + 431 + 0 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 302729724756900 + 18690585674121 = 17399130^2 + 4323261^2 .

It is not a de Polignac number, because 321420310431021 - 2¹⁰ = 321420310429997 is a prime.

It is a super-2 number, since 2×321420310431021² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321420310431091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17856683912826 + ... + 17856683912843.

It is an arithmetic number, because the mean of its divisors is an integer number (77378963622285).

Almost surely, 2^{321420310431021} is an apocalyptic number.

It is an amenable number.

321420310431021 is a deficient number, since it is larger than the sum of its proper divisors (142853471302689).

321420310431021 is a wasteful number, since it uses less digits than its factorization.

321420310431021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35713367825675 (or 35713367825672 counting only the distinct ones).

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

Adding to 321420310431021 its reverse (120134013024123), we get a palindrome (441554323455144).

The spelling of 321420310431021 in words is "three hundred twenty-one trillion, four hundred twenty billion, three hundred ten million, four hundred thirty-one thousand, twenty-one".