2103120121 has 4 divisors (see below), whose sum is σ = 2105586532. Its totient is φ = 2100653712.

The previous prime is 2103120091. The next prime is 2103120137. The reversal of 2103120121 is 1210213012.

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 235929600 + 1867190521 = 15360^2 + 43211^2 .

It is a cyclic number.

It is not a de Polignac number, because 2103120121 - 2¹⁵ = 2103087353 is a prime.

It is a super-2 number, since 2×2103120121² = 8846228486710109282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2103120221) 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, 1231926 + ... + 1233631.

It is an arithmetic number, because the mean of its divisors is an integer number (526396633).

Almost surely, 2^2103120121 is an apocalyptic number.

It is an amenable number.

2103120121 is a deficient number, since it is larger than the sum of its proper divisors (2466411).

2103120121 is an equidigital number, since it uses as much as digits as its factorization.

2103120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466410.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2103120121 is about 45859.7876248898. The cubic root of 2103120121 is about 1281.2130673280.

Adding to 2103120121 its reverse (1210213012), we get a palindrome (3313333133).

The spelling of 2103120121 in words is "two billion, one hundred three million, one hundred twenty thousand, one hundred twenty-one".