22122212200221 has 32 divisors (see below), whose sum is σ = 36657656213760. Its totient is φ = 11576101948416.

The previous prime is 22122212200199. The next prime is 22122212200247. The reversal of 22122212200221 is 12200221222122.

It is not a de Polignac number, because 22122212200221 - 2⁹ = 22122212199709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22122212200421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 837378426 + ... + 837404843.

It is an arithmetic number, because the mean of its divisors is an integer number (1145551756680).

Almost surely, 2^{22122212200221} is an apocalyptic number.

22122212200221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22122212200221 is a deficient number, since it is larger than the sum of its proper divisors (14535444013539).

22122212200221 is a wasteful number, since it uses less digits than its factorization.

22122212200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674783333.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 22122212200221 its reverse (12200221222122), we get a palindrome (34322433422343).

The spelling of 22122212200221 in words is "twenty-two trillion, one hundred twenty-two billion, two hundred twelve million, two hundred thousand, two hundred twenty-one".