22000020020221 has 4 divisors (see below), whose sum is σ = 22047742406844. Its totient is φ = 21952297633600.

The previous prime is 22000020020219. The next prime is 22000020020339. The reversal of 22000020020221 is 12202002000022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3685685794596 + 18314334225625 = 1919814^2 + 4279525^2 .

It is a cyclic number.

It is not a de Polignac number, because 22000020020221 - 2¹ = 22000020020219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22000020020021) 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, 23861192620 + ... + 23861193541.

It is an arithmetic number, because the mean of its divisors is an integer number (5511935601711).

Almost surely, 2^{22000020020221} is an apocalyptic number.

It is an amenable number.

22000020020221 is a deficient number, since it is larger than the sum of its proper divisors (47722386623).

22000020020221 is an equidigital number, since it uses as much as digits as its factorization.

22000020020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47722386622.

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 22000020020221 its reverse (12202002000022), we get a palindrome (34202022020243).

The spelling of 22000020020221 in words is "twenty-two trillion, twenty million, twenty thousand, two hundred twenty-one".