1222343245521 has 24 divisors (see below), whose sum is σ = 1843052702504. Its totient is φ = 779873391360.

The previous prime is 1222343245469. The next prime is 1222343245549. The reversal of 1222343245521 is 1255423432221.

1222343245521 is a `hidden beast` number, since 1 + 2 + 22 + 343 + 245 + 52 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 498548966400 + 723794279121 = 706080^2 + 850761^2 .

It is not a de Polignac number, because 1222343245521 - 2³³ = 1213753310929 is a prime.

It is a super-2 number, since 2×1222343245521² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222343245421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30067396 + ... + 30108021.

Almost surely, 2^{1222343245521} is an apocalyptic number.

It is an amenable number.

1222343245521 is a deficient number, since it is larger than the sum of its proper divisors (620709456983).

1222343245521 is a wasteful number, since it uses less digits than its factorization.

1222343245521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60175521 (or 60175518 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

Adding to 1222343245521 its reverse (1255423432221), we get a palindrome (2477766677742).

The spelling of 1222343245521 in words is "one trillion, two hundred twenty-two billion, three hundred forty-three million, two hundred forty-five thousand, five hundred twenty-one".