321214221431 has 4 divisors (see below), whose sum is σ = 321631926000. Its totient is φ = 320796516864.

The previous prime is 321214221409. The next prime is 321214221457. The reversal of 321214221431 is 134122412123.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321214221431 is a prime.

It is a super-2 number, since 2×321214221431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321214221431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321214221481) 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, 208851131 + ... + 208852668.

It is an arithmetic number, because the mean of its divisors is an integer number (80407981500).

Almost surely, 2^321214221431 is an apocalyptic number.

321214221431 is a deficient number, since it is larger than the sum of its proper divisors (417704569).

321214221431 is an equidigital number, since it uses as much as digits as its factorization.

321214221431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417704568.

The product of its digits is 2304, while the sum is 26.

Adding to 321214221431 its reverse (134122412123), we get a palindrome (455336633554).

The spelling of 321214221431 in words is "three hundred twenty-one billion, two hundred fourteen million, two hundred twenty-one thousand, four hundred thirty-one".