1221105002 has 64 divisors (see below), whose sum is σ = 2139830784. Its totient is φ = 517601280.

The previous prime is 1221104999. The next prime is 1221105071. The reversal of 1221105002 is 2005011221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5240678 + ... + 5240910.

It is an arithmetic number, because the mean of its divisors is an integer number (33434856).

Almost surely, 2^1221105002 is an apocalyptic number.

1221105002 is a deficient number, since it is larger than the sum of its proper divisors (918725782).

1221105002 is a wasteful number, since it uses less digits than its factorization.

1221105002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 1221105002 is about 34944.3128706232. The cubic root of 1221105002 is about 1068.8522359388.

Adding to 1221105002 its reverse (2005011221), we get a palindrome (3226116223).

The spelling of 1221105002 in words is "one billion, two hundred twenty-one million, one hundred five thousand, two".