121864499 has 8 divisors (see below), whose sum is σ = 129098640. Its totient is φ = 114712416.

The previous prime is 121864481. The next prime is 121864513. The reversal of 121864499 is 994468121.

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

It is a cyclic number.

It is not a de Polignac number, because 121864499 - 2⁸ = 121864243 is a prime.

It is a super-2 number, since 2×121864499² = 29701912233042002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121864459) 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, 17444 + ... + 23409.

It is an arithmetic number, because the mean of its divisors is an integer number (16137330).

Almost surely, 2^121864499 is an apocalyptic number.

121864499 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

121864499 is a deficient number, since it is larger than the sum of its proper divisors (7234141).

121864499 is a wasteful number, since it uses less digits than its factorization.

121864499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41029.

The product of its digits is 124416, while the sum is 44.

The square root of 121864499 is about 11039.2254710192. The cubic root of 121864499 is about 495.7838806002.

The spelling of 121864499 in words is "one hundred twenty-one million, eight hundred sixty-four thousand, four hundred ninety-nine".