2171251112 has 16 divisors (see below), whose sum is σ = 4211478900. Its totient is φ = 1048190080.

The previous prime is 2171251097. The next prime is 2171251123. The reversal of 2171251112 is 2111521712.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2124656836 + 46594276 = 46094^2 + 6826^2 .

It is a super-2 number, since 2×2171251112² = 9428662782722473088, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4679189 + ... + 4679652.

Almost surely, 2^2171251112 is an apocalyptic number.

It is an amenable number.

2171251112 is a deficient number, since it is larger than the sum of its proper divisors (2040227788).

2171251112 is a wasteful number, since it uses less digits than its factorization.

2171251112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9358876 (or 9358872 counting only the distinct ones).

The product of its digits is 280, while the sum is 23.

The square root of 2171251112 is about 46596.6856332079. The cubic root of 2171251112 is about 1294.9013529306.

Adding to 2171251112 its reverse (2111521712), we get a palindrome (4282772824).

The spelling of 2171251112 in words is "two billion, one hundred seventy-one million, two hundred fifty-one thousand, one hundred twelve".