11222112720 has 320 divisors, whose sum is σ = 42936251904. Its totient is φ = 2361139200.

The previous prime is 11222112719. The next prime is 11222112731. The reversal of 11222112720 is 2721122211.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15309474 + ... + 15310206.

Almost surely, 2^11222112720 is an apocalyptic number.

11222112720 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 11222112720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21468125952).

11222112720 is an abundant number, since it is smaller than the sum of its proper divisors (31714139184).

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

11222112720 is a wasteful number, since it uses less digits than its factorization.

11222112720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470 (or 1464 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

Adding to 11222112720 its reverse (2721122211), we get a palindrome (13943234931).

The spelling of 11222112720 in words is "eleven billion, two hundred twenty-two million, one hundred twelve thousand, seven hundred twenty".