2221122856 has 8 divisors (see below), whose sum is σ = 4164605370. Its totient is φ = 1110561424.

The previous prime is 2221122833. The next prime is 2221122863. The reversal of 2221122856 is 6582211222.

It can be written as a sum of positive squares in only one way, i.e., 2196421956 + 24700900 = 46866^2 + 4970^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138820171 + ... + 138820186.

Almost surely, 2^2221122856 is an apocalyptic number.

It is an amenable number.

2221122856 is a deficient number, since it is larger than the sum of its proper divisors (1943482514).

2221122856 is a wasteful number, since it uses less digits than its factorization.

2221122856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277640363 (or 277640359 counting only the distinct ones).

The product of its digits is 7680, while the sum is 31.

The square root of 2221122856 is about 47128.7900969248. The cubic root of 2221122856 is about 1304.7406512309.

The spelling of 2221122856 in words is "two billion, two hundred twenty-one million, one hundred twenty-two thousand, eight hundred fifty-six".