1222220111 has 16 divisors (see below), whose sum is σ = 1408974336. Its totient is φ = 1038544416.

The previous prime is 1222220107. The next prime is 1222220113. The reversal of 1222220111 is 1110222221.

It is not a de Polignac number, because 1222220111 - 2² = 1222220107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222220113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 421910 + ... + 424796.

It is an arithmetic number, because the mean of its divisors is an integer number (88060896).

Almost surely, 2^1222220111 is an apocalyptic number.

1222220111 is a deficient number, since it is larger than the sum of its proper divisors (186754225).

1222220111 is a wasteful number, since it uses less digits than its factorization.

1222220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3398.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1222220111 is about 34960.2647444209. The cubic root of 1222220111 is about 1069.1774943785.

Adding to 1222220111 its reverse (1110222221), we get a palindrome (2332442332).

The spelling of 1222220111 in words is "one billion, two hundred twenty-two million, two hundred twenty thousand, one hundred eleven".