121452531525 has 36 divisors (see below), whose sum is σ = 234268444228. Its totient is φ = 59792014080.

The previous prime is 121452531521. The next prime is 121452531553. The reversal of 121452531525 is 525135254121.

121452531525 is a `hidden beast` number, since 1 + 2 + 1 + 452 + 53 + 152 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 43740376164 + 77712155361 = 209142^2 + 278769^2 .

It is not a de Polignac number, because 121452531525 - 2² = 121452531521 is a prime.

It is a super-2 number, since 2×121452531525² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121452531525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121452531521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 20758192 + ... + 20764041.

Almost surely, 2^121452531525 is an apocalyptic number.

121452531525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121452531525 is a deficient number, since it is larger than the sum of its proper divisors (112815912703).

121452531525 is a wasteful number, since it uses less digits than its factorization.

121452531525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41522262 (or 41522254 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

Adding to 121452531525 its reverse (525135254121), we get a palindrome (646587785646).

The spelling of 121452531525 in words is "one hundred twenty-one billion, four hundred fifty-two million, five hundred thirty-one thousand, five hundred twenty-five".