1122020111 has 4 divisors (see below), whose sum is σ = 1188021312. Its totient is φ = 1056018912.

The previous prime is 1122020089. The next prime is 1122020131. The reversal of 1122020111 is 1110202211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1122020111 - 2⁶ = 1122020047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1122020092 and 1122020101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122020131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33000575 + ... + 33000608.

It is an arithmetic number, because the mean of its divisors is an integer number (297005328).

Almost surely, 2^1122020111 is an apocalyptic number.

1122020111 is a deficient number, since it is larger than the sum of its proper divisors (66001201).

1122020111 is an equidigital number, since it uses as much as digits as its factorization.

1122020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66001200.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1122020111 is about 33496.5686451613. The cubic root of 1122020111 is about 1039.1228152679.

Adding to 1122020111 its reverse (1110202211), we get a palindrome (2232222322).

The spelling of 1122020111 in words is "one billion, one hundred twenty-two million, twenty thousand, one hundred eleven".