2501420121 has 6 divisors (see below), whose sum is σ = 3613162410. Its totient is φ = 1667613408.

The previous prime is 2501420083. The next prime is 2501420153. The reversal of 2501420121 is 1210241052.

2501420121 is a `hidden beast` number, since 2 + 501 + 42 + 0 + 121 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2010177225 + 491242896 = 44835^2 + 22164^2 .

It is not a de Polignac number, because 2501420121 - 2¹⁰ = 2501419097 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2501420094 and 2501420103.

It is not an unprimeable number, because it can be changed into a prime (2501420921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138967776 + ... + 138967793.

It is an arithmetic number, because the mean of its divisors is an integer number (602193735).

Almost surely, 2^2501420121 is an apocalyptic number.

It is an amenable number.

2501420121 is a deficient number, since it is larger than the sum of its proper divisors (1111742289).

2501420121 is a wasteful number, since it uses less digits than its factorization.

2501420121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277935575 (or 277935572 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 2501420121 is about 50014.1991938289. The cubic root of 2501420121 is about 1357.4657464165.

Adding to 2501420121 its reverse (1210241052), we get a palindrome (3711661173).

The spelling of 2501420121 in words is "two billion, five hundred one million, four hundred twenty thousand, one hundred twenty-one".