22210020021 has 16 divisors (see below), whose sum is σ = 33860683904. Its totient is φ = 12685123584.

The previous prime is 22210019981. The next prime is 22210020071. The reversal of 22210020021 is 12002001222.

It is not a de Polignac number, because 22210020021 - 2⁷ = 22210019893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22210019979 and 22210020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22210020071) 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, 219820 + ... + 304533.

It is an arithmetic number, because the mean of its divisors is an integer number (2116292744).

Almost surely, 2^22210020021 is an apocalyptic number.

22210020021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22210020021 is a deficient number, since it is larger than the sum of its proper divisors (11650663883).

22210020021 is a wasteful number, since it uses less digits than its factorization.

22210020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526380.

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

Adding to 22210020021 its reverse (12002001222), we get a palindrome (34212021243).

The spelling of 22210020021 in words is "twenty-two billion, two hundred ten million, twenty thousand, twenty-one".