8112401220 has 192 divisors, whose sum is σ = 28397408256. Its totient is φ = 1681067520.

The previous prime is 8112401153. The next prime is 8112401239. The reversal of 8112401220 is 221042118.

It is a super-2 number, since 2×8112401220² (a number of 21 digits) contains 22 as substring.

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

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, 1831929 + ... + 1836351.

It is an arithmetic number, because the mean of its divisors is an integer number (147903168).

Almost surely, 2^8112401220 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 8112401220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14198704128).

8112401220 is an abundant number, since it is smaller than the sum of its proper divisors (20285007036).

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

8112401220 is a wasteful number, since it uses less digits than its factorization.

8112401220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4850 (or 4848 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 8112401220 is about 90068.8693167623. The cubic root of 8112401220 is about 2009.3232394033.

Adding to 8112401220 its reverse (221042118), we get a palindrome (8333443338).

The spelling of 8112401220 in words is "eight billion, one hundred twelve million, four hundred one thousand, two hundred twenty".