22001232021 has 16 divisors (see below), whose sum is σ = 29494132800. Its totient is φ = 14588045568.

The previous prime is 22001232013. The next prime is 22001232031. The reversal of 22001232021 is 12023210022.

It is a happy number.

It is not a de Polignac number, because 22001232021 - 2³ = 22001232013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001232031) 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, 654810 + ... + 687588.

It is an arithmetic number, because the mean of its divisors is an integer number (1843383300).

Almost surely, 2^22001232021 is an apocalyptic number.

It is an amenable number.

22001232021 is a deficient number, since it is larger than the sum of its proper divisors (7492900779).

22001232021 is a wasteful number, since it uses less digits than its factorization.

22001232021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33988.

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

Adding to 22001232021 its reverse (12023210022), we get a palindrome (34024442043).

The spelling of 22001232021 in words is "twenty-two billion, one million, two hundred thirty-two thousand, twenty-one".