22000021200221 has 2 divisors, whose sum is σ = 22000021200222. Its totient is φ = 22000021200220.

The previous prime is 22000021200191. The next prime is 22000021200257. The reversal of 22000021200221 is 12200212000022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19184303640121 + 2815717560100 = 4379989^2 + 1678010^2 .

It is a cyclic number.

It is not a de Polignac number, because 22000021200221 - 2¹⁴ = 22000021183837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22000021200196 and 22000021200205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22000021200721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000010600110 + 11000010600111.

It is an arithmetic number, because the mean of its divisors is an integer number (11000010600111).

Almost surely, 2^{22000021200221} is an apocalyptic number.

It is an amenable number.

22000021200221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22000021200221 is an equidigital number, since it uses as much as digits as its factorization.

22000021200221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 22000021200221 its reverse (12200212000022), we get a palindrome (34200233200243).

The spelling of 22000021200221 in words is "twenty-two trillion, twenty-one million, two hundred thousand, two hundred twenty-one".