22200201221521 has 2 divisors, whose sum is σ = 22200201221522. Its totient is φ = 22200201221520.

The previous prime is 22200201221501. The next prime is 22200201221543. The reversal of 22200201221521 is 12512210200222.

It is an a-pointer prime, because the next prime (22200201221543) can be obtained adding 22200201221521 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21950864780625 + 249336440896 = 4685175^2 + 499336^2 .

It is a cyclic number.

It is not a de Polignac number, because 22200201221521 - 2¹³ = 22200201213329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22200201221492 and 22200201221501.

It is not a weakly prime, because it can be changed into another prime (22200201221501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11100100610760 + 11100100610761.

It is an arithmetic number, because the mean of its divisors is an integer number (11100100610761).

Almost surely, 2^{22200201221521} is an apocalyptic number.

It is an amenable number.

22200201221521 is a deficient number, since it is larger than the sum of its proper divisors (1).

22200201221521 is an equidigital number, since it uses as much as digits as its factorization.

22200201221521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 22200201221521 its reverse (12512210200222), we get a palindrome (34712411421743).

The spelling of 22200201221521 in words is "twenty-two trillion, two hundred billion, two hundred one million, two hundred twenty-one thousand, five hundred twenty-one".