1221200000110 has 16 divisors (see below), whose sum is σ = 2219923962432. Its totient is φ = 483643564000.

The previous prime is 1221200000107. The next prime is 1221200000147. The reversal of 1221200000110 is 110000021221.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 604553446 + ... + 604555465.

It is an arithmetic number, because the mean of its divisors is an integer number (138745247652).

Almost surely, 2^{1221200000110} is an apocalyptic number.

1221200000110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221200000110 is a deficient number, since it is larger than the sum of its proper divisors (998723962322).

1221200000110 is a wasteful number, since it uses less digits than its factorization.

1221200000110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209109019.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1221200000110 its reverse (110000021221), we get a palindrome (1331200021331).

The spelling of 1221200000110 in words is "one trillion, two hundred twenty-one billion, two hundred million, one hundred ten", and thus it is an aban number.