1225456545221 has 48 divisors (see below), whose sum is σ = 1324586649600. Its totient is φ = 1131765600000.

The previous prime is 1225456545197. The next prime is 1225456545239.

1225456545221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1225456545221 - 2¹⁰ = 1225456544197 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225456545241) 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 47 ways as a sum of consecutive naturals, for example, 1064687996 + ... + 1064689146.

It is an arithmetic number, because the mean of its divisors is an integer number (27595555200).

Almost surely, 2^{1225456545221} is an apocalyptic number.

It is an amenable number.

1225456545221 is a deficient number, since it is larger than the sum of its proper divisors (99130104379).

1225456545221 is a wasteful number, since it uses less digits than its factorization.

1225456545221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502 (or 1401 counting only the distinct ones).

The product of its digits is 960000, while the sum is 44.

The spelling of 1225456545221 in words is "one trillion, two hundred twenty-five billion, four hundred fifty-six million, five hundred forty-five thousand, two hundred twenty-one".