121343043525 has 96 divisors (see below), whose sum is σ = 232140142080. Its totient is φ = 55310112000.

The previous prime is 121343043463. The next prime is 121343043557. The reversal of 121343043525 is 525340343121.

It is not a de Polignac number, because 121343043525 - 2¹⁹ = 121342519237 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2023879 + ... + 2082971.

It is an arithmetic number, because the mean of its divisors is an integer number (2418126480).

Almost surely, 2^121343043525 is an apocalyptic number.

121343043525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121343043525 is a deficient number, since it is larger than the sum of its proper divisors (110797098555).

121343043525 is a wasteful number, since it uses less digits than its factorization.

121343043525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59267 (or 59262 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

Adding to 121343043525 its reverse (525340343121), we get a palindrome (646683386646).

The spelling of 121343043525 in words is "one hundred twenty-one billion, three hundred forty-three million, forty-three thousand, five hundred twenty-five".