1221102404 has 24 divisors (see below), whose sum is σ = 2197637568. Its totient is φ = 593421920.

The previous prime is 1221102373. The next prime is 1221102419. The reversal of 1221102404 is 4042011221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4232 + ... + 49599.

It is an arithmetic number, because the mean of its divisors is an integer number (91568232).

Almost surely, 2^1221102404 is an apocalyptic number.

It is an amenable number.

1221102404 is a deficient number, since it is larger than the sum of its proper divisors (976535164).

1221102404 is a wasteful number, since it uses less digits than its factorization.

1221102404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53995 (or 53993 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1221102404 is about 34944.2756971725. The cubic root of 1221102404 is about 1068.8514779149.

Adding to 1221102404 its reverse (4042011221), we get a palindrome (5263113625).

The spelling of 1221102404 in words is "one billion, two hundred twenty-one million, one hundred two thousand, four hundred four".