12099010121 has 4 divisors (see below), whose sum is σ = 13198920144. Its totient is φ = 10999100100.

The previous prime is 12099010117. The next prime is 12099010139. The reversal of 12099010121 is 12101099021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12099010121 - 2² = 12099010117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12099010141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549954995 + ... + 549955016.

It is an arithmetic number, because the mean of its divisors is an integer number (3299730036).

Almost surely, 2^12099010121 is an apocalyptic number.

12099010121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12099010121 is a deficient number, since it is larger than the sum of its proper divisors (1099910023).

12099010121 is a wasteful number, since it uses less digits than its factorization.

12099010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099910022.

The product of its (nonzero) digits is 324, while the sum is 26.

The spelling of 12099010121 in words is "twelve billion, ninety-nine million, ten thousand, one hundred twenty-one".