11111011111222 has 16 divisors (see below), whose sum is σ = 18290526734592. Its totient is φ = 5020217321320.

The previous prime is 11111011111217. The next prime is 11111011111247. The reversal of 11111011111222 is 22211111011111.

It is a junction number, because it is equal to n+sod(n) for n = 11111011111196 and 11111011111205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1512109978 + ... + 1512117325.

It is an arithmetic number, because the mean of its divisors is an integer number (1143157920912).

Almost surely, 2^{11111011111222} is an apocalyptic number.

11111011111222 is a deficient number, since it is larger than the sum of its proper divisors (7179515623370).

11111011111222 is a wasteful number, since it uses less digits than its factorization.

11111011111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3024227483.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 11111011111222 its reverse (22211111011111), we get a palindrome (33322122122333).

It can be divided in two parts, 11111011111 and 222, that multiplied together give a palindrome (2466644466642).

The spelling of 11111011111222 in words is "eleven trillion, one hundred eleven billion, eleven million, one hundred eleven thousand, two hundred twenty-two".