121000212099 has 80 divisors (see below), whose sum is σ = 198122705088. Its totient is φ = 73147650048.

The previous prime is 121000212077. The next prime is 121000212139. The reversal of 121000212099 is 990212000121.

It is not a de Polignac number, because 121000212099 - 2²⁴ = 120983434883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (121000212029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 13988994 + ... + 13997640.

Almost surely, 2^121000212099 is an apocalyptic number.

121000212099 is a deficient number, since it is larger than the sum of its proper divisors (77122492989).

121000212099 is a wasteful number, since it uses less digits than its factorization.

121000212099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8906 (or 8897 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The spelling of 121000212099 in words is "one hundred twenty-one billion, two hundred twelve thousand, ninety-nine".