311321201223 has 12 divisors (see below), whose sum is σ = 433927221560. Its totient is φ = 198523663536.

The previous prime is 311321201209. The next prime is 311321201227. The reversal of 311321201223 is 322102123113.

It is not a de Polignac number, because 311321201223 - 2⁹ = 311321200711 is a prime.

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 311321201223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311321201227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98083228 + ... + 98086401.

Almost surely, 2^311321201223 is an apocalyptic number.

311321201223 is a deficient number, since it is larger than the sum of its proper divisors (122606020337).

311321201223 is a wasteful number, since it uses less digits than its factorization.

311321201223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196169678 (or 196169655 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 311321201223 its reverse (322102123113), we get a palindrome (633423324336).

The spelling of 311321201223 in words is "three hundred eleven billion, three hundred twenty-one million, two hundred one thousand, two hundred twenty-three".