1222020111 has 16 divisors (see below), whose sum is σ = 1776911360. Its totient is φ = 742491360.

The previous prime is 1222020083. The next prime is 1222020133. The reversal of 1222020111 is 1110202221.

It is not a de Polignac number, because 1222020111 - 2⁷ = 1222019983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222020161) 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, 195235 + ... + 201396.

It is an arithmetic number, because the mean of its divisors is an integer number (111056960).

Almost surely, 2^1222020111 is an apocalyptic number.

1222020111 is a deficient number, since it is larger than the sum of its proper divisors (554891249).

1222020111 is a wasteful number, since it uses less digits than its factorization.

1222020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396726.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1222020111 is about 34957.4042371570. The cubic root of 1222020111 is about 1069.1191723240.

Adding to 1222020111 its reverse (1110202221), we get a palindrome (2332222332).

The spelling of 1222020111 in words is "one billion, two hundred twenty-two million, twenty thousand, one hundred eleven".