1221100201110 has 32 divisors (see below), whose sum is σ = 2956575362400. Its totient is φ = 322745067008.

The previous prime is 1221100201067. The next prime is 1221100201129. The reversal of 1221100201110 is 111020011221.

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 15 ways as a sum of consecutive naturals, for example, 180099885 + ... + 180106664.

It is an arithmetic number, because the mean of its divisors is an integer number (92392980075).

Almost surely, 2^{1221100201110} is an apocalyptic number.

1221100201110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221100201110 is an abundant number, since it is smaller than the sum of its proper divisors (1735475161290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221100201110 is a wasteful number, since it uses less digits than its factorization.

1221100201110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360206672.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1221100201110 its reverse (111020011221), we get a palindrome (1332120212331).

The spelling of 1221100201110 in words is "one trillion, two hundred twenty-one billion, one hundred million, two hundred one thousand, one hundred ten".