1111244123220 has 384 divisors, whose sum is σ = 4019306102784. Its totient is φ = 222626880000.

The previous prime is 1111244123177. The next prime is 1111244123221. The reversal of 1111244123220 is 223214421111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111244123221) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 38798305 + ... + 38826935.

It is an arithmetic number, because the mean of its divisors is an integer number (10466942976).

Almost surely, 2^{1111244123220} is an apocalyptic number.

1111244123220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1111244123220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2009653051392).

1111244123220 is an abundant number, since it is smaller than the sum of its proper divisors (2908061979564).

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

1111244123220 is a wasteful number, since it uses less digits than its factorization.

1111244123220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28963 (or 28961 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 1111244123220 its reverse (223214421111), we get a palindrome (1334458544331).

The spelling of 1111244123220 in words is "one trillion, one hundred eleven billion, two hundred forty-four million, one hundred twenty-three thousand, two hundred twenty".