22122221000021 has 8 divisors (see below), whose sum is σ = 22126226410944. Its totient is φ = 22118215863520.

The previous prime is 22122220999981. The next prime is 22122221000023. The reversal of 22122221000021 is 12000012222122.

It is a happy number.

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-22122221000021 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 (22122221000023) 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, 223368905 + ... + 223467921.

It is an arithmetic number, because the mean of its divisors is an integer number (2765778301368).

Almost surely, 2^{22122221000021} is an apocalyptic number.

It is an amenable number.

22122221000021 is a deficient number, since it is larger than the sum of its proper divisors (4005410923).

22122221000021 is an equidigital number, since it uses as much as digits as its factorization.

22122221000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137211.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22122221000021 its reverse (12000012222122), we get a palindrome (34122233222143).

The spelling of 22122221000021 in words is "twenty-two trillion, one hundred twenty-two billion, two hundred twenty-one million, twenty-one", and thus it is an aban number.