1221632790404 has 48 divisors (see below), whose sum is σ = 2413181955072. Its totient is φ = 536897572992.

The previous prime is 1221632790401. The next prime is 1221632790419. The reversal of 1221632790404 is 4040972361221.

It is not an unprimeable number, because it can be changed into a prime (1221632790401) 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, 2023499 + ... + 2556914.

It is an arithmetic number, because the mean of its divisors is an integer number (50274624064).

Almost surely, 2^{1221632790404} is an apocalyptic number.

It is an amenable number.

1221632790404 is a deficient number, since it is larger than the sum of its proper divisors (1191549164668).

1221632790404 is a wasteful number, since it uses less digits than its factorization.

1221632790404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4580676 (or 4580674 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 1221632790404 in words is "one trillion, two hundred twenty-one billion, six hundred thirty-two million, seven hundred ninety thousand, four hundred four".