12011020989 has 16 divisors (see below), whose sum is σ = 17474655744. Its totient is φ = 7277706800.

The previous prime is 12011020951. The next prime is 12011021003. The reversal of 12011020989 is 98902011021.

It is a cyclic number.

It is not a de Polignac number, because 12011020989 - 2⁸ = 12011020733 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011020289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109024 + ... + 189494.

It is an arithmetic number, because the mean of its divisors is an integer number (1092165984).

Almost surely, 2^12011020989 is an apocalyptic number.

It is an amenable number.

12011020989 is a deficient number, since it is larger than the sum of its proper divisors (5463634755).

12011020989 is a wasteful number, since it uses less digits than its factorization.

12011020989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85008.

The product of its (nonzero) digits is 2592, while the sum is 33.

The spelling of 12011020989 in words is "twelve billion, eleven million, twenty thousand, nine hundred eighty-nine".