1222101111 has 64 divisors (see below), whose sum is σ = 2095488000. Its totient is φ = 627984000.

The previous prime is 1222101079. The next prime is 1222101137. The reversal of 1222101111 is 1111012221.

It is not a de Polignac number, because 1222101111 - 2⁵ = 1222101079 is a prime.

It is a super-2 number, since 2×1222101111² = 2987062251014868642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222101211) 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 63 ways as a sum of consecutive naturals, for example, 1142685 + ... + 1143753.

It is an arithmetic number, because the mean of its divisors is an integer number (32742000).

Almost surely, 2^1222101111 is an apocalyptic number.

1222101111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1222101111 is a deficient number, since it is larger than the sum of its proper divisors (873386889).

1222101111 is a wasteful number, since it uses less digits than its factorization.

1222101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205 (or 1191 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1222101111 is about 34958.5627708005. The cubic root of 1222101111 is about 1069.1427935227.

Adding to 1222101111 its reverse (1111012221), we get a palindrome (2333113332).

It can be divided in two parts, 122210 and 1111, that added together give a palindrome (123321).

The spelling of 1222101111 in words is "one billion, two hundred twenty-two million, one hundred one thousand, one hundred eleven".