1221565422604 has 24 divisors (see below), whose sum is σ = 2195643972368. Its totient is φ = 594240494400.

The previous prime is 1221565422577. The next prime is 1221565422613. The reversal of 1221565422604 is 4062245651221.

It is a super-2 number, since 2×1221565422604² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2410762 + ... + 2873134.

Almost surely, 2^{1221565422604} is an apocalyptic number.

It is an amenable number.

1221565422604 is a deficient number, since it is larger than the sum of its proper divisors (974078549764).

1221565422604 is a wasteful number, since it uses less digits than its factorization.

1221565422604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480265 (or 480263 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 40.

The spelling of 1221565422604 in words is "one trillion, two hundred twenty-one billion, five hundred sixty-five million, four hundred twenty-two thousand, six hundred four".