3120121 has 4 divisors (see below), whose sum is σ = 3136000. Its totient is φ = 3104244.

The previous prime is 3120107. The next prime is 3120127. The reversal of 3120121 is 1210213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3120121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3120098 and 3120107.

It is not an unprimeable number, because it can be changed into a prime (3120127) 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, 7641 + ... + 8038.

It is an arithmetic number, because the mean of its divisors is an integer number (784000).

Almost surely, 2^3120121 is an apocalyptic number.

It is an amenable number.

3120121 is a deficient number, since it is larger than the sum of its proper divisors (15879).

3120121 is a wasteful number, since it uses less digits than its factorization.

3120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15878.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 3120121 is about 1766.3864243138. The cubic root of 3120121 is about 146.1247604384.

Adding to 3120121 its reverse (1210213), we get a palindrome (4330334).

The spelling of 3120121 in words is "three million, one hundred twenty thousand, one hundred twenty-one".