25100121 has 16 divisors (see below), whose sum is σ = 35380800. Its totient is φ = 15784128.

The previous prime is 25100087. The next prime is 25100123. The reversal of 25100121 is 12100152.

It is not a de Polignac number, because 25100121 - 2¹⁸ = 24837977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25100097 and 25100106.

It is not an unprimeable number, because it can be changed into a prime (25100123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14515 + ... + 16151.

It is an arithmetic number, because the mean of its divisors is an integer number (2211300).

Almost surely, 2^25100121 is an apocalyptic number.

It is an amenable number.

25100121 is a deficient number, since it is larger than the sum of its proper divisors (10280679).

25100121 is a wasteful number, since it uses less digits than its factorization.

25100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 25100121 is about 5010.0020958079. The cubic root of 25100121 is about 292.7915946667.

Adding to 25100121 its reverse (12100152), we get a palindrome (37200273).

The spelling of 25100121 in words is "twenty-five million, one hundred thousand, one hundred twenty-one".