121010199966 has 48 divisors (see below), whose sum is σ = 283721203584. Its totient is φ = 38582958744.

The previous prime is 121010199941. The next prime is 121010199983. The reversal of 121010199966 is 669991010121.

It is a super-2 number, since 2×121010199966² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5401696 + ... + 5424051.

It is an arithmetic number, because the mean of its divisors is an integer number (5910858408).

Almost surely, 2^121010199966 is an apocalyptic number.

121010199966 is an abundant number, since it is smaller than the sum of its proper divisors (162711003618).

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

121010199966 is a wasteful number, since it uses less digits than its factorization.

121010199966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10825787 (or 10825775 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 45.

The spelling of 121010199966 in words is "one hundred twenty-one billion, ten million, one hundred ninety-nine thousand, nine hundred sixty-six".