12020899121 has 32 divisors (see below), whose sum is σ = 15896217600. Its totient is φ = 8800646400.

The previous prime is 12020899091. The next prime is 12020899129. The reversal of 12020899121 is 12199802021.

It is a de Polignac number, because none of the positive numbers 2^k-12020899121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12020899129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 776426 + ... + 791756.

It is an arithmetic number, because the mean of its divisors is an integer number (496756800).

Almost surely, 2^12020899121 is an apocalyptic number.

12020899121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12020899121 is a deficient number, since it is larger than the sum of its proper divisors (3875318479).

12020899121 is a wasteful number, since it uses less digits than its factorization.

12020899121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15965.

The product of its (nonzero) digits is 5184, while the sum is 35.

The spelling of 12020899121 in words is "twelve billion, twenty million, eight hundred ninety-nine thousand, one hundred twenty-one".