1122021018 has 16 divisors (see below), whose sum is σ = 2493380160. Its totient is φ = 374006988.

The previous prime is 1122021011. The next prime is 1122021031. The reversal of 1122021018 is 8101202211.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1122021011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10389030 + ... + 10389137.

It is an arithmetic number, because the mean of its divisors is an integer number (155836260).

Almost surely, 2^1122021018 is an apocalyptic number.

1122021018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1122021018 is an abundant number, since it is smaller than the sum of its proper divisors (1371359142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1122021018 is a wasteful number, since it uses less digits than its factorization.

1122021018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20778178 (or 20778172 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 1122021018 is about 33496.5821838587. The cubic root of 1122021018 is about 1039.1230952642.

Adding to 1122021018 its reverse (8101202211), we get a palindrome (9223223229).

The spelling of 1122021018 in words is "one billion, one hundred twenty-two million, twenty-one thousand, eighteen".