1221303123110 has 32 divisors (see below), whose sum is σ = 2522170889280. Its totient is φ = 417103183872.

The previous prime is 1221303123013. The next prime is 1221303123217. The reversal of 1221303123110 is 113213031221.

It is a happy 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, 33925955 + ... + 33961934.

It is an arithmetic number, because the mean of its divisors is an integer number (78817840290).

Almost surely, 2^{1221303123110} is an apocalyptic number.

1221303123110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221303123110 is an abundant number, since it is smaller than the sum of its proper divisors (1300867766170).

1221303123110 is a wasteful number, since it uses less digits than its factorization.

1221303123110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67888160.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1221303123110 its reverse (113213031221), we get a palindrome (1334516154331).

The spelling of 1221303123110 in words is "one trillion, two hundred twenty-one billion, three hundred three million, one hundred twenty-three thousand, one hundred ten".