12232020021 has 32 divisors (see below), whose sum is σ = 18401230848. Its totient is φ = 7175805120.

The previous prime is 12232019993. The next prime is 12232020029. The reversal of 12232020021 is 12002023221.

It is a happy number.

It is not a de Polignac number, because 12232020021 - 2⁹ = 12232019509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12232020029) 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, 5500 + ... + 156506.

It is an arithmetic number, because the mean of its divisors is an integer number (575038464).

Almost surely, 2^12232020021 is an apocalyptic number.

It is an amenable number.

12232020021 is a deficient number, since it is larger than the sum of its proper divisors (6169210827).

12232020021 is a wasteful number, since it uses less digits than its factorization.

12232020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151121.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 12232020021 its reverse (12002023221), we get a palindrome (24234043242).

The spelling of 12232020021 in words is "twelve billion, two hundred thirty-two million, twenty thousand, twenty-one".