121644200499 has 8 divisors (see below), whose sum is σ = 162838452672. Its totient is φ = 80773041000.

The previous prime is 121644200467. The next prime is 121644200501. The reversal of 121644200499 is 994002446121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121644200499 - 2⁵ = 121644200467 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121644200499.

It is not an unprimeable number, because it can be changed into a prime (121644200449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80772289 + ... + 80773794.

It is an arithmetic number, because the mean of its divisors is an integer number (20354806584).

Almost surely, 2^121644200499 is an apocalyptic number.

121644200499 is a deficient number, since it is larger than the sum of its proper divisors (41194252173).

121644200499 is a wasteful number, since it uses less digits than its factorization.

121644200499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161546337.

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 121644200499 in words is "one hundred twenty-one billion, six hundred forty-four million, two hundred thousand, four hundred ninety-nine".