22210001000021 has 8 divisors (see below), whose sum is σ = 23015682640920. Its totient is φ = 21406973995008.

The previous prime is 22210000999997. The next prime is 22210001000023. The reversal of 22210001000021 is 12000010001222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16382175300100 + 5827825699921 = 4047490^2 + 2414089^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22210001000021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22210000999966 and 22210001000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22210001000023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 663641936 + ... + 663675401.

It is an arithmetic number, because the mean of its divisors is an integer number (2876960330115).

Almost surely, 2^{22210001000021} is an apocalyptic number.

It is an amenable number.

22210001000021 is a deficient number, since it is larger than the sum of its proper divisors (805681640899).

22210001000021 is a wasteful number, since it uses less digits than its factorization.

22210001000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327317943.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 22210001000021 its reverse (12000010001222), we get a palindrome (34210011001243).

The spelling of 22210001000021 in words is "twenty-two trillion, two hundred ten billion, one million, twenty-one", and thus it is an aban number.