321121220231 has 16 divisors (see below), whose sum is σ = 388604692800. Its totient is φ = 259041753600.

The previous prime is 321121220221. The next prime is 321121220249. The reversal of 321121220231 is 132022121123.

It is not a de Polignac number, because 321121220231 - 2²² = 321117025927 is a prime.

It is a super-2 number, since 2×321121220231² (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 (321121220201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2520245 + ... + 2644593.

It is an arithmetic number, because the mean of its divisors is an integer number (24287793300).

Almost surely, 2^321121220231 is an apocalyptic number.

321121220231 is a deficient number, since it is larger than the sum of its proper divisors (67483472569).

321121220231 is a wasteful number, since it uses less digits than its factorization.

321121220231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146074.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 321121220231 its reverse (132022121123), we get a palindrome (453143341354).

The spelling of 321121220231 in words is "three hundred twenty-one billion, one hundred twenty-one million, two hundred twenty thousand, two hundred thirty-one".