1221101120110 has 8 divisors (see below), whose sum is σ = 2197982016216. Its totient is φ = 488440448040.

The previous prime is 1221101120059. The next prime is 1221101120123. The reversal of 1221101120110 is 110211011221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61055055996 + ... + 61055056015.

It is an arithmetic number, because the mean of its divisors is an integer number (274747752027).

Almost surely, 2^{1221101120110} is an apocalyptic number.

1221101120110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221101120110 is a deficient number, since it is larger than the sum of its proper divisors (976880896106).

1221101120110 is a wasteful number, since it uses less digits than its factorization.

1221101120110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122110112018.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1221101120110 its reverse (110211011221), we get a palindrome (1331312131331).

The spelling of 1221101120110 in words is "one trillion, two hundred twenty-one billion, one hundred one million, one hundred twenty thousand, one hundred ten".