1222311011111 has 4 divisors (see below), whose sum is σ = 1223016327912. Its totient is φ = 1221605694312.

The previous prime is 1222311011059. The next prime is 1222311011113. The reversal of 1222311011111 is 1111101132221.

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

It is a cyclic number.

It is not a de Polignac number, because 1222311011111 - 2¹⁴ = 1222310994727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1222311011111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222311011113) 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, 352655801 + ... + 352659266.

It is an arithmetic number, because the mean of its divisors is an integer number (305754081978).

Almost surely, 2^{1222311011111} is an apocalyptic number.

1222311011111 is a deficient number, since it is larger than the sum of its proper divisors (705316801).

1222311011111 is an equidigital number, since it uses as much as digits as its factorization.

1222311011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705316800.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 1222311011111 its reverse (1111101132221), we get a palindrome (2333412143332).

The spelling of 1222311011111 in words is "one trillion, two hundred twenty-two billion, three hundred eleven million, eleven thousand, one hundred eleven".