2221222210 has 24 divisors (see below), whose sum is σ = 4247228340. Its totient is φ = 836223744.

The previous prime is 2221222207. The next prime is 2221222229. The reversal of 2221222210 is 122221222.

It can be written as a sum of positive squares in 6 ways, for example, as 2005337961 + 215884249 = 44781^2 + 14693^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 381405 + ... + 387184.

Almost surely, 2^2221222210 is an apocalyptic number.

2221222210 is a deficient number, since it is larger than the sum of its proper divisors (2026006130).

2221222210 is a wasteful number, since it uses less digits than its factorization.

2221222210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768630 (or 768613 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2221222210 is about 47129.8441542087. The cubic root of 2221222210 is about 1304.7601052456.

Adding to 2221222210 its reverse (122221222), we get a palindrome (2343443432).

The spelling of 2221222210 in words is "two billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred ten".