2221125291 has 24 divisors (see below), whose sum is σ = 3999949824. Its totient is φ = 1153830960.

The previous prime is 2221125287. The next prime is 2221125299. The reversal of 2221125291 is 1925211222.

It is a happy number.

2221125291 is a `hidden beast` number, since 2 + 22 + 112 + 529 + 1 = 666.

2221125291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2221125291 - 2² = 2221125287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2221125299) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1601851 + ... + 1603236.

It is an arithmetic number, because the mean of its divisors is an integer number (166664576).

Almost surely, 2^2221125291 is an apocalyptic number.

2221125291 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2221125291 is a deficient number, since it is larger than the sum of its proper divisors (1778824533).

2221125291 is a wasteful number, since it uses less digits than its factorization.

2221125291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3205111 (or 3205108 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 2221125291 is about 47128.8159303838. The cubic root of 2221125291 is about 1304.7411280231.

The spelling of 2221125291 in words is "two billion, two hundred twenty-one million, one hundred twenty-five thousand, two hundred ninety-one".