121323436564 has 24 divisors (see below), whose sum is σ = 239089003776. Its totient is φ = 53368080000.

The previous prime is 121323436561. The next prime is 121323436579. The reversal of 121323436564 is 465634323121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121323436561) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 44472037 + ... + 44474764.

It is an arithmetic number, because the mean of its divisors is an integer number (9962041824).

Almost surely, 2^121323436564 is an apocalyptic number.

It is an amenable number.

121323436564 is a deficient number, since it is larger than the sum of its proper divisors (117765567212).

121323436564 is a wasteful number, since it uses less digits than its factorization.

121323436564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88946847 (or 88946845 counting only the distinct ones).

The product of its digits is 311040, while the sum is 40.

Adding to 121323436564 its reverse (465634323121), we get a palindrome (586957759685).

The spelling of 121323436564 in words is "one hundred twenty-one billion, three hundred twenty-three million, four hundred thirty-six thousand, five hundred sixty-four".