311120121 has 16 divisors (see below), whose sum is σ = 447168960. Its totient is φ = 191273280.

The previous prime is 311120113. The next prime is 311120129. The reversal of 311120121 is 121021113.

It is an interprime number because it is at equal distance from previous prime (311120113) and next prime (311120129).

It is not a de Polignac number, because 311120121 - 2³ = 311120113 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 311120097 and 311120106.

It is not an unprimeable number, because it can be changed into a prime (311120129) 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, 44686 + ... + 51176.

It is an arithmetic number, because the mean of its divisors is an integer number (27948060).

Almost surely, 2^311120121 is an apocalyptic number.

It is an amenable number.

311120121 is a deficient number, since it is larger than the sum of its proper divisors (136048839).

311120121 is a wasteful number, since it uses less digits than its factorization.

311120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7736.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 311120121 is about 17638.5974782577. The cubic root of 311120121 is about 677.6041123026.

Adding to 311120121 its reverse (121021113), we get a palindrome (432141234).

It can be divided in two parts, 3111 and 20121, that added together give a palindrome (23232).

The spelling of 311120121 in words is "three hundred eleven million, one hundred twenty thousand, one hundred twenty-one".