11221220212222 has 4 divisors (see below), whose sum is σ = 16831830318336. Its totient is φ = 5610610106110.

The previous prime is 11221220212183. The next prime is 11221220212271. The reversal of 11221220212222 is 22221202212211.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 11221220212193 and 11221220212202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2805305053054 + ... + 2805305053057.

It is an arithmetic number, because the mean of its divisors is an integer number (4207957579584).

Almost surely, 2^{11221220212222} is an apocalyptic number.

11221220212222 is a deficient number, since it is larger than the sum of its proper divisors (5610610106114).

11221220212222 is an equidigital number, since it uses as much as digits as its factorization.

11221220212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5610610106113.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 11221220212222 its reverse (22221202212211), we get a palindrome (33442422424433).

The spelling of 11221220212222 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty million, two hundred twelve thousand, two hundred twenty-two".