1221221000110 has 16 divisors (see below), whose sum is σ = 2269107407232. Its totient is φ = 472730709600.

The previous prime is 1221221000071. The next prime is 1221221000161. The reversal of 1221221000110 is 110001221221.

It is a super-2 number, since 2×1221221000110² (a number of 25 digits) contains 22 as substring.

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, 1969710981 + ... + 1969711600.

It is an arithmetic number, because the mean of its divisors is an integer number (141819212952).

Almost surely, 2^{1221221000110} is an apocalyptic number.

1221221000110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221221000110 is a deficient number, since it is larger than the sum of its proper divisors (1047886407122).

1221221000110 is a wasteful number, since it uses less digits than its factorization.

1221221000110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3939422619.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1221221000110 its reverse (110001221221), we get a palindrome (1331222221331).

The spelling of 1221221000110 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred ten", and thus it is an aban number.