25220336121 has 8 divisors (see below), whose sum is σ = 37363460960. Its totient is φ = 16813557396.

The previous prime is 25220336117. The next prime is 25220336137. The reversal of 25220336121 is 12163302252.

It is a happy number.

25220336121 is a `hidden beast` number, since 25 + 2 + 20 + 3 + 3 + 612 + 1 = 666.

It is not a de Polignac number, because 25220336121 - 2² = 25220336117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 934086523 = 25220336121 / (2 + 5 + 2 + 2 + 0 + 3 + 3 + 6 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25220336101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467043235 + ... + 467043288.

It is an arithmetic number, because the mean of its divisors is an integer number (4670432620).

Almost surely, 2^25220336121 is an apocalyptic number.

It is an amenable number.

25220336121 is a deficient number, since it is larger than the sum of its proper divisors (12143124839).

25220336121 is an equidigital number, since it uses as much as digits as its factorization.

25220336121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934086532 (or 934086526 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 25220336121 its reverse (12163302252), we get a palindrome (37383638373).

The spelling of 25220336121 in words is "twenty-five billion, two hundred twenty million, three hundred thirty-six thousand, one hundred twenty-one".