121980699 has 24 divisors (see below), whose sum is σ = 186732000. Its totient is φ = 76594560.

The previous prime is 121980689. The next prime is 121980713. The reversal of 121980699 is 996089121.

It is not a de Polignac number, because 121980699 - 2⁵ = 121980667 is a prime.

It is a super-3 number, since 3×121980699³ (a number of 25 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (121980659) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5002 + ... + 16400.

It is an arithmetic number, because the mean of its divisors is an integer number (7780500).

Almost surely, 2^121980699 is an apocalyptic number.

121980699 is a deficient number, since it is larger than the sum of its proper divisors (64751301).

121980699 is a wasteful number, since it uses less digits than its factorization.

121980699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11475 (or 11472 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The square root of 121980699 is about 11044.4872674108. The cubic root of 121980699 is about 495.9414101688.

It can be divided in two parts, 1219 and 80699, that added together give a palindrome (81918).

The spelling of 121980699 in words is "one hundred twenty-one million, nine hundred eighty thousand, six hundred ninety-nine".