12041221525 has 12 divisors (see below), whose sum is σ = 14934070944. Its totient is φ = 9631070000.

The previous prime is 12041221523. The next prime is 12041221547. The reversal of 12041221525 is 52512214021.

It is not a de Polignac number, because 12041221525 - 2¹ = 12041221523 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12041221525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12041221523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88770 + ... + 178780.

It is an arithmetic number, because the mean of its divisors is an integer number (1244505912).

Almost surely, 2^12041221525 is an apocalyptic number.

It is an amenable number.

12041221525 is a deficient number, since it is larger than the sum of its proper divisors (2892849419).

12041221525 is an equidigital number, since it uses as much as digits as its factorization.

12041221525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95372 (or 95367 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 12041221525 its reverse (52512214021), we get a palindrome (64553435546).

The spelling of 12041221525 in words is "twelve billion, forty-one million, two hundred twenty-one thousand, five hundred twenty-five".