121525254645 has 32 divisors (see below), whose sum is σ = 195585933312. Its totient is φ = 64432740672.

The previous prime is 121525254577. The next prime is 121525254671. The reversal of 121525254645 is 546452525121.

It is not a de Polignac number, because 121525254645 - 2¹⁹ = 121524730357 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121525254597 and 121525254606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1729264 + ... + 1798166.

It is an arithmetic number, because the mean of its divisors is an integer number (6112060416).

Almost surely, 2^121525254645 is an apocalyptic number.

121525254645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121525254645 is a deficient number, since it is larger than the sum of its proper divisors (74060678667).

121525254645 is a wasteful number, since it uses less digits than its factorization.

121525254645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69601.

The product of its digits is 480000, while the sum is 42.

Adding to 121525254645 its reverse (546452525121), we get a palindrome (667977779766).

The spelling of 121525254645 in words is "one hundred twenty-one billion, five hundred twenty-five million, two hundred fifty-four thousand, six hundred forty-five".