22010001220021 has 4 divisors (see below), whose sum is σ = 22013097302700. Its totient is φ = 22006905137344.

The previous prime is 22010001219977. The next prime is 22010001220073. The reversal of 22010001220021 is 12002210001022.

It is a happy number.

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 1528719579396 + 20481281640625 = 1236414^2 + 4525625^2 .

It is a cyclic number.

It is not a de Polignac number, because 22010001220021 - 2²³ = 22009992831413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22010001219983 and 22010001220010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22010001200021) 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, 1548030676 + ... + 1548044893.

It is an arithmetic number, because the mean of its divisors is an integer number (5503274325675).

Almost surely, 2^{22010001220021} is an apocalyptic number.

It is an amenable number.

22010001220021 is a deficient number, since it is larger than the sum of its proper divisors (3096082679).

22010001220021 is an equidigital number, since it uses as much as digits as its factorization.

22010001220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3096082678.

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

Adding to 22010001220021 its reverse (12002210001022), we get a palindrome (34012211221043).

The spelling of 22010001220021 in words is "twenty-two trillion, ten billion, one million, two hundred twenty thousand, twenty-one".