2221122857 has 16 divisors (see below), whose sum is σ = 2453243520. Its totient is φ = 2001542400.

The previous prime is 2221122833. The next prime is 2221122863. The reversal of 2221122857 is 7582211222.

It is a cyclic number.

It is not a de Polignac number, because 2221122857 - 2⁶ = 2221122793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2221122257) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 65057 + ... + 93137.

It is an arithmetic number, because the mean of its divisors is an integer number (153327720).

Almost surely, 2^2221122857 is an apocalyptic number.

It is an amenable number.

2221122857 is a deficient number, since it is larger than the sum of its proper divisors (232120663).

2221122857 is a wasteful number, since it uses less digits than its factorization.

2221122857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28304.

The product of its digits is 8960, while the sum is 32.

The square root of 2221122857 is about 47128.7901075341. The cubic root of 2221122857 is about 1304.7406514267.

The spelling of 2221122857 in words is "two billion, two hundred twenty-one million, one hundred twenty-two thousand, eight hundred fifty-seven".