121525444125 has 40 divisors (see below), whose sum is σ = 226559454264. Its totient is φ = 64813564800.

The previous prime is 121525444123. The next prime is 121525444141. The reversal of 121525444125 is 521444525121.

121525444125 is a `hidden beast` number, since 1 + 2 + 1 + 52 + 544 + 41 + 25 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 14845472964 + 106679971161 = 121842^2 + 326619^2 .

It is not a de Polignac number, because 121525444125 - 2¹ = 121525444123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121525444125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121525444123) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5991132 + ... + 6011381.

Almost surely, 2^121525444125 is an apocalyptic number.

121525444125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121525444125 is a deficient number, since it is larger than the sum of its proper divisors (105034010139).

121525444125 is an equidigital number, since it uses as much as digits as its factorization.

121525444125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12002540 (or 12002521 counting only the distinct ones).

The product of its digits is 64000, while the sum is 36.

Adding to 121525444125 its reverse (521444525121), we get a palindrome (642969969246).

The spelling of 121525444125 in words is "one hundred twenty-one billion, five hundred twenty-five million, four hundred forty-four thousand, one hundred twenty-five".