22211020021 has 4 divisors (see below), whose sum is σ = 22225998592. Its totient is φ = 22196041452.

The previous prime is 22211020019. The next prime is 22211020031. The reversal of 22211020021 is 12002011222.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12002011222 = 2 ⋅6001005611.

It is a cyclic number.

It is not a de Polignac number, because 22211020021 - 2¹ = 22211020019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22211019983 and 22211020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211020031) 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, 7487061 + ... + 7490026.

It is an arithmetic number, because the mean of its divisors is an integer number (5556499648).

Almost surely, 2^22211020021 is an apocalyptic number.

It is an amenable number.

22211020021 is a deficient number, since it is larger than the sum of its proper divisors (14978571).

22211020021 is a wasteful number, since it uses less digits than its factorization.

22211020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14978570.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22211020021 its reverse (12002011222), we get a palindrome (34213031243).

The spelling of 22211020021 in words is "twenty-two billion, two hundred eleven million, twenty thousand, twenty-one".