1225243544212 has 24 divisors (see below), whose sum is σ = 2237448439296. Its totient is φ = 585973685088.

The previous prime is 1225243544177. The next prime is 1225243544221. The reversal of 1225243544212 is 2124453425221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5447773 + ... + 5668219.

It is an arithmetic number, because the mean of its divisors is an integer number (93227018304).

Almost surely, 2^{1225243544212} is an apocalyptic number.

It is an amenable number.

1225243544212 is a deficient number, since it is larger than the sum of its proper divisors (1012204895084).

1225243544212 is a wasteful number, since it uses less digits than its factorization.

1225243544212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280887 (or 280885 counting only the distinct ones).

The product of its digits is 153600, while the sum is 37.

Adding to 1225243544212 its reverse (2124453425221), we get a palindrome (3349696969433).

The spelling of 1225243544212 in words is "one trillion, two hundred twenty-five billion, two hundred forty-three million, five hundred forty-four thousand, two hundred twelve".