121344400015 has 32 divisors (see below), whose sum is σ = 150929452800. Its totient is φ = 93596166144.

The previous prime is 121344400007. The next prime is 121344400027. The reversal of 121344400015 is 510004443121.

It is a cyclic number.

It is not a de Polignac number, because 121344400015 - 2³ = 121344400007 is a prime.

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, 16070461 + ... + 16078009.

It is an arithmetic number, because the mean of its divisors is an integer number (4716545400).

Almost surely, 2^121344400015 is an apocalyptic number.

121344400015 is a deficient number, since it is larger than the sum of its proper divisors (29585052785).

121344400015 is an equidigital number, since it uses as much as digits as its factorization.

121344400015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8611.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 121344400015 its reverse (510004443121), we get a palindrome (631348843136).

The spelling of 121344400015 in words is "one hundred twenty-one billion, three hundred forty-four million, four hundred thousand, fifteen".