1220222210 has 8 divisors (see below), whose sum is σ = 2196399996. Its totient is φ = 488088880.

The previous prime is 1220222177. The next prime is 1220222219. The reversal of 1220222210 is 122220221.

It can be written as a sum of positive squares in 2 ways, for example, as 1148328769 + 71893441 = 33887^2 + 8479^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1220222219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61011101 + ... + 61011120.

Almost surely, 2^1220222210 is an apocalyptic number.

1220222210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220222210 is a deficient number, since it is larger than the sum of its proper divisors (976177786).

1220222210 is a wasteful number, since it uses less digits than its factorization.

1220222210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122022228.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1220222210 is about 34931.6791752129. The cubic root of 1220222210 is about 1068.5945999787.

Adding to 1220222210 its reverse (122220221), we get a palindrome (1342442431).

The spelling of 1220222210 in words is "one billion, two hundred twenty million, two hundred twenty-two thousand, two hundred ten".