12231021999 has 16 divisors (see below), whose sum is σ = 18808739840. Its totient is φ = 6925033440.

The previous prime is 12231021931. The next prime is 12231022009. The reversal of 12231021999 is 99912013221.

It is not a de Polignac number, because 12231021999 - 2¹⁵ = 12230989231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231021499) 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, 2669407 + ... + 2673984.

It is an arithmetic number, because the mean of its divisors is an integer number (1175546240).

Almost surely, 2^12231021999 is an apocalyptic number.

12231021999 is a deficient number, since it is larger than the sum of its proper divisors (6577717841).

12231021999 is a wasteful number, since it uses less digits than its factorization.

12231021999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5343510.

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

The spelling of 12231021999 in words is "twelve billion, two hundred thirty-one million, twenty-one thousand, nine hundred ninety-nine".