1222222111011 has 16 divisors (see below), whose sum is σ = 1975308462720. Its totient is φ = 740740673160.

The previous prime is 1222222111007. The next prime is 1222222111021. The reversal of 1222222111011 is 1101112222221.

It is not a de Polignac number, because 1222222111011 - 2² = 1222222111007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222222111001) 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 15 ways as a sum of consecutive naturals, for example, 2057612685 + ... + 2057613278.

It is an arithmetic number, because the mean of its divisors is an integer number (123456778920).

Almost surely, 2^{1222222111011} is an apocalyptic number.

1222222111011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1222222111011 is a deficient number, since it is larger than the sum of its proper divisors (753086351709).

1222222111011 is a wasteful number, since it uses less digits than its factorization.

1222222111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4115225983 (or 4115225977 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1222222111011 its reverse (1101112222221), we get a palindrome (2323334333232).

It can be divided in two parts, 12222221 and 11011, that multiplied together give a palindrome (134578875431).

The spelling of 1222222111011 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-two million, one hundred eleven thousand, eleven".