3121010121 has 4 divisors (see below), whose sum is σ = 4161346832. Its totient is φ = 2080673412.

The previous prime is 3121010117. The next prime is 3121010153. The reversal of 3121010121 is 1210101213.

3121010121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 3121010121 - 2² = 3121010117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3121010097 and 3121010106.

It is not an unprimeable number, because it can be changed into a prime (3121010021) 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, 520168351 + ... + 520168356.

It is an arithmetic number, because the mean of its divisors is an integer number (1040336708).

Almost surely, 2^3121010121 is an apocalyptic number.

It is an amenable number.

3121010121 is a deficient number, since it is larger than the sum of its proper divisors (1040336711).

3121010121 is a wasteful number, since it uses less digits than its factorization.

3121010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040336710.

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

The square root of 3121010121 is about 55866.0014767479. The cubic root of 3121010121 is about 1461.3863920080.

Adding to 3121010121 its reverse (1210101213), we get a palindrome (4331111334).

It can be divided in two parts, 3 and 121010121, that multiplied together give a palindrome (363030363).

The spelling of 3121010121 in words is "three billion, one hundred twenty-one million, ten thousand, one hundred twenty-one".