22110000201221 has 2 divisors, whose sum is σ = 22110000201222. Its totient is φ = 22110000201220.

The previous prime is 22110000201203. The next prime is 22110000201277. The reversal of 22110000201221 is 12210200001122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20468114188900 + 1641886012321 = 4524170^2 + 1281361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22110000201221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22110000201196 and 22110000201205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22110000201281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11055000100610 + 11055000100611.

It is an arithmetic number, because the mean of its divisors is an integer number (11055000100611).

Almost surely, 2^{22110000201221} is an apocalyptic number.

It is an amenable number.

22110000201221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22110000201221 is an equidigital number, since it uses as much as digits as its factorization.

22110000201221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22110000201221 its reverse (12210200001122), we get a palindrome (34320200202343).

The spelling of 22110000201221 in words is "twenty-two trillion, one hundred ten billion, two hundred one thousand, two hundred twenty-one".