1221022210 has 32 divisors (see below), whose sum is σ = 2218233600. Its totient is φ = 483899328.

The previous prime is 1221022193. The next prime is 1221022223. The reversal of 1221022210 is 122201221.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 522204 + ... + 524536.

It is an arithmetic number, because the mean of its divisors is an integer number (69319800).

Almost surely, 2^1221022210 is an apocalyptic number.

1221022210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221022210 is a deficient number, since it is larger than the sum of its proper divisors (997211390).

1221022210 is a wasteful number, since it uses less digits than its factorization.

1221022210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2802.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1221022210 is about 34943.1282228709. The cubic root of 1221022210 is about 1068.8280790169.

Adding to 1221022210 its reverse (122201221), we get a palindrome (1343223431).

The spelling of 1221022210 in words is "one billion, two hundred twenty-one million, twenty-two thousand, two hundred ten".