25104220121 has 16 divisors (see below), whose sum is σ = 26194129920. Its totient is φ = 24043176960.

The previous prime is 25104220109. The next prime is 25104220157. The reversal of 25104220121 is 12102240152.

It is a cyclic number.

It is not a de Polignac number, because 25104220121 - 2¹⁰ = 25104219097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25104220093 and 25104220102.

It is not an unprimeable number, because it can be changed into a prime (25104220321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374816 + ... + 436686.

It is an arithmetic number, because the mean of its divisors is an integer number (1637133120).

Almost surely, 2^25104220121 is an apocalyptic number.

It is an amenable number.

25104220121 is a deficient number, since it is larger than the sum of its proper divisors (1089909799).

25104220121 is an equidigital number, since it uses as much as digits as its factorization.

25104220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62104.

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 25104220121 its reverse (12102240152), we get a palindrome (37206460273).

The spelling of 25104220121 in words is "twenty-five billion, one hundred four million, two hundred twenty thousand, one hundred twenty-one".