12021260899 has 4 divisors (see below), whose sum is σ = 12021677136. Its totient is φ = 12020844664.

The previous prime is 12021260863. The next prime is 12021260947. The reversal of 12021260899 is 99806212021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12021260899 - 2²¹ = 12019163747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12021200899) 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, 161284 + ... + 223729.

It is an arithmetic number, because the mean of its divisors is an integer number (3005419284).

Almost surely, 2^12021260899 is an apocalyptic number.

12021260899 is a deficient number, since it is larger than the sum of its proper divisors (416237).

12021260899 is an equidigital number, since it uses as much as digits as its factorization.

12021260899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416236.

The product of its (nonzero) digits is 31104, while the sum is 40.

The spelling of 12021260899 in words is "twelve billion, twenty-one million, two hundred sixty thousand, eight hundred ninety-nine".