11221220221210 has 8 divisors (see below), whose sum is σ = 20198196398196. Its totient is φ = 4488488088480.

The previous prime is 11221220221199. The next prime is 11221220221217. The reversal of 11221220221210 is 1212202212211.

It can be written as a sum of positive squares in 2 ways, for example, as 10048779540361 + 1172440680849 = 3169981^2 + 1082793^2 .

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

It is not an unprimeable number, because it can be changed into a prime (11221220221217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561061011051 + ... + 561061011070.

Almost surely, 2^{11221220221210} is an apocalyptic number.

11221220221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11221220221210 is a deficient number, since it is larger than the sum of its proper divisors (8976976176986).

11221220221210 is a wasteful number, since it uses less digits than its factorization.

11221220221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122122022128.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 11221220221210 its reverse (1212202212211), we get a palindrome (12433422433421).

The spelling of 11221220221210 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty million, two hundred twenty-one thousand, two hundred ten".