22000212021 has 4 divisors (see below), whose sum is σ = 29333616032. Its totient is φ = 14666808012.

The previous prime is 22000211983. The next prime is 22000212037. The reversal of 22000212021 is 12021200022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 22000212021 - 2³⁰ = 20926470197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22000211988 and 22000212006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22000212061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3666702001 + ... + 3666702006.

It is an arithmetic number, because the mean of its divisors is an integer number (7333404008).

Almost surely, 2^22000212021 is an apocalyptic number.

It is an amenable number.

22000212021 is a deficient number, since it is larger than the sum of its proper divisors (7333404011).

22000212021 is an equidigital number, since it uses as much as digits as its factorization.

22000212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7333404010.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 22000212021 its reverse (12021200022), we get a palindrome (34021412043).

The spelling of 22000212021 in words is "twenty-two billion, two hundred twelve thousand, twenty-one".