12251250121 has 6 divisors (see below), whose sum is σ = 13466250266. Its totient is φ = 11137500000.

The previous prime is 12251250101. The next prime is 12251250131. The reversal of 12251250121 is 12105215221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9285249600 + 2966000521 = 96360^2 + 54461^2 .

It is not a de Polignac number, because 12251250121 - 2⁷ = 12251249993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12251250092 and 12251250101.

It is not an unprimeable number, because it can be changed into a prime (12251250101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50624880 + ... + 50625121.

Almost surely, 2^12251250121 is an apocalyptic number.

12251250121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12251250121 is a deficient number, since it is larger than the sum of its proper divisors (1215000145).

12251250121 is a wasteful number, since it uses less digits than its factorization.

12251250121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101250023 (or 101250012 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

Adding to 12251250121 its reverse (12105215221), we get a palindrome (24356465342).

The spelling of 12251250121 in words is "twelve billion, two hundred fifty-one million, two hundred fifty thousand, one hundred twenty-one".