12020099981 has 4 divisors (see below), whose sum is σ = 12132437472. Its totient is φ = 11907762492.

The previous prime is 12020099963. The next prime is 12020099983. The reversal of 12020099981 is 18999002021.

12020099981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-12020099981 is a prime.

It is a super-2 number, since 2×12020099981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020099983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56168585 + ... + 56168798.

It is an arithmetic number, because the mean of its divisors is an integer number (3033109368).

Almost surely, 2^12020099981 is an apocalyptic number.

It is an amenable number.

12020099981 is a deficient number, since it is larger than the sum of its proper divisors (112337491).

12020099981 is a wasteful number, since it uses less digits than its factorization.

12020099981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112337490.

The product of its (nonzero) digits is 23328, while the sum is 41.

The spelling of 12020099981 in words is "twelve billion, twenty million, ninety-nine thousand, nine hundred eighty-one".