10122130121 has 4 divisors (see below), whose sum is σ = 10123786692. Its totient is φ = 10120473552.

The previous prime is 10122130049. The next prime is 10122130189. The reversal of 10122130121 is 12103122101.

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 5310765625 + 4811364496 = 72875^2 + 69364^2 .

It is a cyclic number.

It is not a de Polignac number, because 10122130121 - 2¹⁰ = 10122129097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10122130096 and 10122130105.

It is not an unprimeable number, because it can be changed into a prime (10122130721) 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, 819086 + ... + 831351.

It is an arithmetic number, because the mean of its divisors is an integer number (2530946673).

Almost surely, 2^10122130121 is an apocalyptic number.

It is an amenable number.

10122130121 is a deficient number, since it is larger than the sum of its proper divisors (1656571).

10122130121 is an equidigital number, since it uses as much as digits as its factorization.

10122130121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1656570.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 10122130121 its reverse (12103122101), we get a palindrome (22225252222).

The spelling of 10122130121 in words is "ten billion, one hundred twenty-two million, one hundred thirty thousand, one hundred twenty-one".