321212245540231 has 16 divisors (see below), whose sum is σ = 337319747610048. Its totient is φ = 305283302438400.

The previous prime is 321212245540223. The next prime is 321212245540261. The reversal of 321212245540231 is 132045542212123.

It is a cyclic number.

It is not a de Polignac number, because 321212245540231 - 2³ = 321212245540223 is a prime.

It is a super-2 number, since 2×321212245540231² (a number of 30 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 (321212245540211) 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 15 ways as a sum of consecutive naturals, for example, 181768671 + ... + 183527311.

It is an arithmetic number, because the mean of its divisors is an integer number (21082484225628).

Almost surely, 2^{321212245540231} is an apocalyptic number.

321212245540231 is a deficient number, since it is larger than the sum of its proper divisors (16107502069817).

321212245540231 is a wasteful number, since it uses less digits than its factorization.

321212245540231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809402.

The product of its (nonzero) digits is 115200, while the sum is 37.

Adding to 321212245540231 its reverse (132045542212123), we get a palindrome (453257787752354).

The spelling of 321212245540231 in words is "three hundred twenty-one trillion, two hundred twelve billion, two hundred forty-five million, five hundred forty thousand, two hundred thirty-one".