1221301323110 has 16 divisors (see below), whose sum is σ = 2398191689232. Its totient is φ = 444109572000.

The previous prime is 1221301323071. The next prime is 1221301323127. The reversal of 1221301323110 is 113231031221.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5551369541 + ... + 5551369760.

It is an arithmetic number, because the mean of its divisors is an integer number (149886980577).

Almost surely, 2^{1221301323110} is an apocalyptic number.

1221301323110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221301323110 is a deficient number, since it is larger than the sum of its proper divisors (1176890366122).

1221301323110 is a wasteful number, since it uses less digits than its factorization.

1221301323110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11102739319.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1221301323110 its reverse (113231031221), we get a palindrome (1334532354331).

The spelling of 1221301323110 in words is "one trillion, two hundred twenty-one billion, three hundred one million, three hundred twenty-three thousand, one hundred ten".