121021110099 has 10 divisors (see below), whose sum is σ = 180784621380. Its totient is φ = 80680740012.

The previous prime is 121021110043. The next prime is 121021110101. The reversal of 121021110099 is 990011120121.

It is a de Polignac number, because none of the positive numbers 2^k-121021110099 is a prime.

It is a super-2 number, since 2×121021110099² (a number of 23 digits) contains 22 as substring.

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 (121021117099) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 747043809 + ... + 747043970.

It is an arithmetic number, because the mean of its divisors is an integer number (18078462138).

Almost surely, 2^121021110099 is an apocalyptic number.

121021110099 is a deficient number, since it is larger than the sum of its proper divisors (59763511281).

121021110099 is an equidigital number, since it uses as much as digits as its factorization.

121021110099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494087791 (or 1494087782 counting only the distinct ones).

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

The spelling of 121021110099 in words is "one hundred twenty-one billion, twenty-one million, one hundred ten thousand, ninety-nine".