2221081 has 12 divisors (see below), whose sum is σ = 2438800. Its totient is φ = 2017008.

The previous prime is 2221069. The next prime is 2221097. The reversal of 2221081 is 1801222.

It is not a de Polignac number, because 2221081 - 2¹¹ = 2219033 is a prime.

It is a super-2 number, since 2×2221081² = 9866401617122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15910 + ... + 16048.

2^2221081 is an apocalyptic number.

It is an amenable number.

2221081 is a deficient number, since it is larger than the sum of its proper divisors (217719).

2221081 is a wasteful number, since it uses less digits than its factorization.

2221081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 2221081 is about 1490.3291582734. The cubic root of 2221081 is about 130.4732455441.

The spelling of 2221081 in words is "two million, two hundred twenty-one thousand, eighty-one".