1111122420 has 24 divisors (see below), whose sum is σ = 3111142944. Its totient is φ = 296299296.

The previous prime is 1111122403. The next prime is 1111122421. The reversal of 1111122420 is 242211111.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1111122420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111122421) 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, 9259294 + ... + 9259413.

It is an arithmetic number, because the mean of its divisors is an integer number (129630956).

Almost surely, 2^1111122420 is an apocalyptic number.

1111122420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111122420 is an abundant number, since it is smaller than the sum of its proper divisors (2000020524).

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

1111122420 is a wasteful number, since it uses less digits than its factorization.

1111122420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18518719 (or 18518717 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1111122420 is about 33333.5029662350. The cubic root of 1111122420 is about 1035.7476825741.

Adding to 1111122420 its reverse (242211111), we get a palindrome (1353333531).

The spelling of 1111122420 in words is "one billion, one hundred eleven million, one hundred twenty-two thousand, four hundred twenty".