1225784875221 has 16 divisors (see below), whose sum is σ = 1828165368000. Its totient is φ = 811705418064.

The previous prime is 1225784875199. The next prime is 1225784875229.

It is a happy number.

1225784875221 is a `hidden beast` number, since 1 + 2 + 2 + 5 + 78 + 48 + 7 + 522 + 1 = 666.

1225784875221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1225784875221 - 2⁹ = 1225784874709 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225784875229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152343091 + ... + 152351136.

It is an arithmetic number, because the mean of its divisors is an integer number (114260335500).

Almost surely, 2^{1225784875221} is an apocalyptic number.

It is an amenable number.

1225784875221 is a deficient number, since it is larger than the sum of its proper divisors (602380492779).

1225784875221 is a wasteful number, since it uses less digits than its factorization.

1225784875221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304694385 (or 304694379 counting only the distinct ones).

The product of its digits is 5017600, while the sum is 54.

The spelling of 1225784875221 in words is "one trillion, two hundred twenty-five billion, seven hundred eighty-four million, eight hundred seventy-five thousand, two hundred twenty-one".