1112164221 has 48 divisors (see below), whose sum is σ = 1824638400. Its totient is φ = 599139072.

The previous prime is 1112164201. The next prime is 1112164223. The reversal of 1112164221 is 1224612111.

It is not a de Polignac number, because 1112164221 - 2⁵ = 1112164189 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112164223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 649915 + ... + 651623.

It is an arithmetic number, because the mean of its divisors is an integer number (38013300).

Almost surely, 2^1112164221 is an apocalyptic number.

It is an amenable number.

1112164221 is a deficient number, since it is larger than the sum of its proper divisors (712474179).

1112164221 is a wasteful number, since it uses less digits than its factorization.

1112164221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1978 (or 1971 counting only the distinct ones).

The product of its digits is 192, while the sum is 21.

The square root of 1112164221 is about 33349.1262404279. The cubic root of 1112164221 is about 1036.0712910522.

Adding to 1112164221 its reverse (1224612111), we get a palindrome (2336776332).

The spelling of 1112164221 in words is "one billion, one hundred twelve million, one hundred sixty-four thousand, two hundred twenty-one".