11999232021 has 32 divisors (see below), whose sum is σ = 18445971456. Its totient is φ = 6796296000.

The previous prime is 11999232019. The next prime is 11999232061. The reversal of 11999232021 is 12023299911.

It is not a de Polignac number, because 11999232021 - 2¹ = 11999232019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11999232061) 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, 2916756 + ... + 2920866.

It is an arithmetic number, because the mean of its divisors is an integer number (576436608).

Almost surely, 2^11999232021 is an apocalyptic number.

It is an amenable number.

11999232021 is a deficient number, since it is larger than the sum of its proper divisors (6446739435).

11999232021 is a wasteful number, since it uses less digits than its factorization.

11999232021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5313.

The product of its (nonzero) digits is 17496, while the sum is 39.

The spelling of 11999232021 in words is "eleven billion, nine hundred ninety-nine million, two hundred thirty-two thousand, twenty-one".