11221211122210 has 16 divisors (see below), whose sum is σ = 20579277757176. Its totient is φ = 4403796062848.

The previous prime is 11221211122129. The next prime is 11221211122217. The reversal of 11221211122210 is 1222111212211.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6922808241129 + 4298402881081 = 2631123^2 + 2073259^2 .

It is not an unprimeable number, because it can be changed into a prime (11221211122217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10586047699 + ... + 10586048758.

Almost surely, 2^{11221211122210} is an apocalyptic number.

11221211122210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11221211122210 is a deficient number, since it is larger than the sum of its proper divisors (9358066634966).

11221211122210 is a wasteful number, since it uses less digits than its factorization.

11221211122210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21172096517.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11221211122210 its reverse (1222111212211), we get a palindrome (12443322334421).

Subtracting from 11221211122210 its reverse (1222111212211), we obtain a palindrome (9999099909999).

The spelling of 11221211122210 in words is "eleven trillion, two hundred twenty-one billion, two hundred eleven million, one hundred twenty-two thousand, two hundred ten".