311102121321 has 12 divisors (see below), whose sum is σ = 473020769520. Its totient is φ = 196485550200.

The previous prime is 311102121251. The next prime is 311102121373. The reversal of 311102121321 is 123121201113.

311102121321 is a `hidden beast` number, since 311 + 10 + 2 + 1 + 21 + 321 = 666.

It is not a de Polignac number, because 311102121321 - 2¹⁵ = 311102088553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311102121294 and 311102121303.

It is not an unprimeable number, because it can be changed into a prime (311102122321) 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, 909655155 + ... + 909655496.

It is an arithmetic number, because the mean of its divisors is an integer number (39418397460).

Almost surely, 2^311102121321 is an apocalyptic number.

It is an amenable number.

311102121321 is a deficient number, since it is larger than the sum of its proper divisors (161918648199).

311102121321 is a wasteful number, since it uses less digits than its factorization.

311102121321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819310676 (or 1819310673 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 311102121321 its reverse (123121201113), we get a palindrome (434223322434).

The spelling of 311102121321 in words is "three hundred eleven billion, one hundred two million, one hundred twenty-one thousand, three hundred twenty-one".