1111111222 has 16 divisors (see below), whose sum is σ = 1889339760. Its totient is φ = 485829792.

The previous prime is 1111111213. The next prime is 1111111231. The reversal of 1111111222 is 2221111111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1111111213) and next prime (1111111231).

It is a Harshad number since it is a multiple of its sum of digits (13).

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

It is a plaindrome in base 10.

It is a zygodrome in base 10.

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, 1124113 + ... + 1125100.

It is an arithmetic number, because the mean of its divisors is an integer number (118083735).

Almost surely, 2^1111111222 is an apocalyptic number.

1111111222 is a deficient number, since it is larger than the sum of its proper divisors (778228538).

1111111222 is a wasteful number, since it uses less digits than its factorization.

1111111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249247.

The product of its digits is 8, while the sum is 13.

The square root of 1111111222 is about 33333.3349966666. The cubic root of 1111111222 is about 1035.7442031070.

Adding to 1111111222 its reverse (2221111111), we get a palindrome (3332222333).

It can be divided in two parts, 1111111 and 222, that multiplied together give a palindrome (246666642).

The spelling of 1111111222 in words is "one billion, one hundred eleven million, one hundred eleven thousand, two hundred twenty-two".