311203042321 has 16 divisors (see below), whose sum is σ = 330850137600. Its totient is φ = 291707385088.

The previous prime is 311203042313. The next prime is 311203042351. The reversal of 311203042321 is 123240302113.

It is a cyclic number.

It is not a de Polignac number, because 311203042321 - 2³ = 311203042313 is a prime.

It is a super-2 number, since 2×311203042321² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 311203042292 and 311203042301.

It is not an unprimeable number, because it can be changed into a prime (311203042351) 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, 4107246 + ... + 4182328.

It is an arithmetic number, because the mean of its divisors is an integer number (20678133600).

Almost surely, 2^311203042321 is an apocalyptic number.

It is an amenable number.

311203042321 is a deficient number, since it is larger than the sum of its proper divisors (19647095279).

311203042321 is a wasteful number, since it uses less digits than its factorization.

311203042321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76088.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 311203042321 its reverse (123240302113), we get a palindrome (434443344434).

The spelling of 311203042321 in words is "three hundred eleven billion, two hundred three million, forty-two thousand, three hundred twenty-one".