121121010099 has 16 divisors (see below), whose sum is σ = 181115533440. Its totient is φ = 79992690120.

The previous prime is 121121010077. The next prime is 121121010103. The reversal of 121121010099 is 990010121121.

It is not a de Polignac number, because 121121010099 - 2⁹ = 121121009587 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 (121121010029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20959557 + ... + 20965334.

It is an arithmetic number, because the mean of its divisors is an integer number (11319720840).

Almost surely, 2^121121010099 is an apocalyptic number.

121121010099 is a deficient number, since it is larger than the sum of its proper divisors (59994523341).

121121010099 is a wasteful number, since it uses less digits than its factorization.

121121010099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41925007 (or 41925001 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 27.

The spelling of 121121010099 in words is "one hundred twenty-one billion, one hundred twenty-one million, ten thousand, ninety-nine".