121002099966 has 40 divisors (see below), whose sum is σ = 295782915384. Its totient is φ = 36667302480.

The previous prime is 121002099961. The next prime is 121002099989. The reversal of 121002099966 is 669990200121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002099961) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 33949425 + ... + 33952988.

Almost surely, 2^121002099966 is an apocalyptic number.

121002099966 is an abundant number, since it is smaller than the sum of its proper divisors (174780815418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121002099966 is a wasteful number, since it uses less digits than its factorization.

121002099966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67902438 (or 67902429 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The spelling of 121002099966 in words is "one hundred twenty-one billion, two million, ninety-nine thousand, nine hundred sixty-six".