11222221222222 has 4 divisors (see below), whose sum is σ = 16833331833336. Its totient is φ = 5611110611110.

The previous prime is 11222221222211. The next prime is 11222221222229. The reversal of 11222221222222 is 22222212222211.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222221222229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2805555305554 + ... + 2805555305557.

It is an arithmetic number, because the mean of its divisors is an integer number (4208332958334).

Almost surely, 2^{11222221222222} is an apocalyptic number.

11222221222222 is a deficient number, since it is larger than the sum of its proper divisors (5611110611114).

11222221222222 is an equidigital number, since it uses as much as digits as its factorization.

11222221222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5611110611113.

The product of its digits is 2048, while the sum is 25.

Adding to 11222221222222 its reverse (22222212222211), we get a palindrome (33444433444433).

The spelling of 11222221222222 in words is "eleven trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty-two".