221222112010 has 32 divisors (see below), whose sum is σ = 416177591760. Its totient is φ = 84556695552.

The previous prime is 221222111941. The next prime is 221222112011. The reversal of 221222112010 is 10211222122.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 133474046281 + 87748065729 = 365341^2 + 296223^2 .

It is not an unprimeable number, because it can be changed into a prime (221222112011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3904009 + ... + 3960268.

Almost surely, 2^221222112010 is an apocalyptic number.

221222112010 is a deficient number, since it is larger than the sum of its proper divisors (194955479750).

221222112010 is a wasteful number, since it uses less digits than its factorization.

221222112010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7864410.

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

Adding to 221222112010 its reverse (10211222122), we get a palindrome (231433334132).

The spelling of 221222112010 in words is "two hundred twenty-one billion, two hundred twenty-two million, one hundred twelve thousand, ten".