7800221112 has 128 divisors (see below), whose sum is σ = 21145872960. Its totient is φ = 2388787200.

The previous prime is 7800221053. The next prime is 7800221131. The reversal of 7800221112 is 2111220087.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3006888 + ... + 3009480.

Almost surely, 2^7800221112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7800221112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10572936480).

7800221112 is an abundant number, since it is smaller than the sum of its proper divisors (13345651848).

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

7800221112 is a wasteful number, since it uses less digits than its factorization.

7800221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2793 (or 2789 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 7800221112 is about 88318.8604546051. The cubic root of 7800221112 is about 1983.2112221471.

Adding to 7800221112 its reverse (2111220087), we get a palindrome (9911441199).

The spelling of 7800221112 in words is "seven billion, eight hundred million, two hundred twenty-one thousand, one hundred twelve".