1522200041221 has 2 divisors, whose sum is σ = 1522200041222. Its totient is φ = 1522200041220.

The previous prime is 1522200041177. The next prime is 1522200041251. The reversal of 1522200041221 is 1221400022251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1092054260196 + 430145781025 = 1045014^2 + 655855^2 .

It is an emirp because it is prime and its reverse (1221400022251) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1522200041221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1522200041192 and 1522200041201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1522200041251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 761100020610 + 761100020611.

It is an arithmetic number, because the mean of its divisors is an integer number (761100020611).

Almost surely, 2^{1522200041221} is an apocalyptic number.

It is an amenable number.

1522200041221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1522200041221 is an equidigital number, since it uses as much as digits as its factorization.

1522200041221 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 1522200041221 its reverse (1221400022251), we get a palindrome (2743600063472).

The spelling of 1522200041221 in words is "one trillion, five hundred twenty-two billion, two hundred million, forty-one thousand, two hundred twenty-one".