390111121 has 4 divisors (see below), whose sum is σ = 413058852. Its totient is φ = 367163392.

The previous prime is 390111089. The next prime is 390111131. The reversal of 390111121 is 121111093.

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

It can be written as a sum of positive squares in 2 ways, for example, as 323460225 + 66650896 = 17985^2 + 8164^2 .

It is a cyclic number.

It is not a de Polignac number, because 390111121 - 2⁵ = 390111089 is a prime.

It is a super-3 number, since 3×390111121³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390111131) 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, 11473840 + ... + 11473873.

It is an arithmetic number, because the mean of its divisors is an integer number (103264713).

Almost surely, 2^390111121 is an apocalyptic number.

It is an amenable number.

390111121 is a deficient number, since it is larger than the sum of its proper divisors (22947731).

390111121 is a wasteful number, since it uses less digits than its factorization.

390111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22947730.

The product of its (nonzero) digits is 54, while the sum is 19.

The square root of 390111121 is about 19751.2308730367. The cubic root of 390111121 is about 730.6837410717.

The spelling of 390111121 in words is "three hundred ninety million, one hundred eleven thousand, one hundred twenty-one".