321120213031 has 4 divisors (see below), whose sum is σ = 322090365064. Its totient is φ = 320150061000.

The previous prime is 321120213023. The next prime is 321120213041. The reversal of 321120213031 is 130312021123.

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 321120213031 - 2³ = 321120213023 is a prime.

It is a super-2 number, since 2×321120213031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321120213041) 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, 485075520 + ... + 485076181.

It is an arithmetic number, because the mean of its divisors is an integer number (80522591266).

Almost surely, 2^321120213031 is an apocalyptic number.

321120213031 is a deficient number, since it is larger than the sum of its proper divisors (970152033).

321120213031 is an equidigital number, since it uses as much as digits as its factorization.

321120213031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970152032.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 321120213031 its reverse (130312021123), we get a palindrome (451432234154).

The spelling of 321120213031 in words is "three hundred twenty-one billion, one hundred twenty million, two hundred thirteen thousand, thirty-one".