1225243544211 has 12 divisors (see below), whose sum is σ = 1769809139280. Its totient is φ = 816823071600.

The previous prime is 1225243544177. The next prime is 1225243544221. The reversal of 1225243544211 is 1124453425221.

1225243544211 is a `hidden beast` number, since 1 + 2 + 2 + 5 + 2 + 435 + 4 + 4 + 211 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1225243544211 is a prime.

It is a super-2 number, since 2×1225243544211² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1225243544221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1064161 + ... + 1892861.

It is an arithmetic number, because the mean of its divisors is an integer number (147484094940).

Almost surely, 2^{1225243544211} is an apocalyptic number.

1225243544211 is a deficient number, since it is larger than the sum of its proper divisors (544565595069).

1225243544211 is a wasteful number, since it uses less digits than its factorization.

1225243544211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992986 (or 992983 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

Adding to 1225243544211 its reverse (1124453425221), we get a palindrome (2349696969432).

The spelling of 1225243544211 in words is "one trillion, two hundred twenty-five billion, two hundred forty-three million, five hundred forty-four thousand, two hundred eleven".