1223121100110 has 128 divisors (see below), whose sum is σ = 3710558121984. Its totient is φ = 251090357760.

The previous prime is 1223121100031. The next prime is 1223121100177. The reversal of 1223121100110 is 110011213221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1223121100110.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5953446 + ... + 6155465.

It is an arithmetic number, because the mean of its divisors is an integer number (28988735328).

Almost surely, 2^{1223121100110} is an apocalyptic number.

1223121100110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1223121100110 is an abundant number, since it is smaller than the sum of its proper divisors (2487437021874).

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

1223121100110 is a wasteful number, since it uses less digits than its factorization.

1223121100110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12108978.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1223121100110 its reverse (110011213221), we get a palindrome (1333132313331).

It can be divided in two parts, 1223121 and 100110, that added together give a palindrome (1323231).

The spelling of 1223121100110 in words is "one trillion, two hundred twenty-three billion, one hundred twenty-one million, one hundred thousand, one hundred ten".