1111243020 has 24 divisors (see below), whose sum is σ = 3111480624. Its totient is φ = 296331456.

The previous prime is 1111242971. The next prime is 1111243057. The reversal of 1111243020 is 203421111.

It is a super-2 number, since 2×1111243020² = 2469722098997440800, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9260299 + ... + 9260418.

It is an arithmetic number, because the mean of its divisors is an integer number (129645026).

Almost surely, 2^1111243020 is an apocalyptic number.

1111243020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111243020 is an abundant number, since it is smaller than the sum of its proper divisors (2000237604).

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

1111243020 is a wasteful number, since it uses less digits than its factorization.

1111243020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18520729 (or 18520727 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1111243020 is about 33335.3119079453. The cubic root of 1111243020 is about 1035.7851541882.

Adding to 1111243020 its reverse (203421111), we get a palindrome (1314664131).

The spelling of 1111243020 in words is "one billion, one hundred eleven million, two hundred forty-three thousand, twenty".