2221212110 has 32 divisors (see below), whose sum is σ = 4311613152. Its totient is φ = 819020160.

The previous prime is 2221212101. The next prime is 2221212113. The reversal of 2221212110 is 112121222.

It is a super-2 number, since 2×2221212110² = 9867566475221304200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221212113) 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, 87125 + ... + 109695.

It is an arithmetic number, because the mean of its divisors is an integer number (134737911).

Almost surely, 2^2221212110 is an apocalyptic number.

2221212110 is a deficient number, since it is larger than the sum of its proper divisors (2090401042).

2221212110 is a wasteful number, since it uses less digits than its factorization.

2221212110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23348.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2221212110 is about 47129.7370032976. The cubic root of 2221212110 is about 1304.7581276411.

Adding to 2221212110 its reverse (112121222), we get a palindrome (2333333332).

The spelling of 2221212110 in words is "two billion, two hundred twenty-one million, two hundred twelve thousand, one hundred ten".