1245412255221 has 20 divisors (see below), whose sum is σ = 1860464489664. Its totient is φ = 830259736200.

The previous prime is 1245412255201. The next prime is 1245412255253. The reversal of 1245412255221 is 1225522145421.

It is a happy number.

1245412255221 is a `hidden beast` number, since 1 + 2 + 4 + 5 + 4 + 122 + 5 + 522 + 1 = 666.

It is not a de Polignac number, because 1245412255221 - 2²⁵ = 1245378700789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245412255201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5989876 + ... + 6194306.

Almost surely, 2^{1245412255221} is an apocalyptic number.

It is an amenable number.

1245412255221 is a deficient number, since it is larger than the sum of its proper divisors (615052234443).

1245412255221 is an equidigital number, since it uses as much as digits as its factorization.

1245412255221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279654 (or 279645 counting only the distinct ones).

The product of its digits is 64000, while the sum is 36.

The spelling of 1245412255221 in words is "one trillion, two hundred forty-five billion, four hundred twelve million, two hundred fifty-five thousand, two hundred twenty-one".