11990298021 has 12 divisors (see below), whose sum is σ = 17311436928. Its totient is φ = 7378644624.

The previous prime is 11990297993. The next prime is 11990298041. The reversal of 11990298021 is 12089209911.

It is not a de Polignac number, because 11990298021 - 2⁵ = 11990297989 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11990298041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11824245 + ... + 11825258.

It is an arithmetic number, because the mean of its divisors is an integer number (1442619744).

Almost surely, 2^11990298021 is an apocalyptic number.

It is an amenable number.

11990298021 is a deficient number, since it is larger than the sum of its proper divisors (5321138907).

11990298021 is a wasteful number, since it uses less digits than its factorization.

11990298021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23649532 (or 23649519 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 42.

The spelling of 11990298021 in words is "eleven billion, nine hundred ninety million, two hundred ninety-eight thousand, twenty-one".