11121420 has 48 divisors (see below), whose sum is σ = 32497920. Its totient is φ = 2836416.

The previous prime is 11121389. The next prime is 11121421. The reversal of 11121420 is 2412111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 11121396 and 11121405.

It is not an unprimeable number, because it can be changed into a prime (11121421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2650 + ... + 5409.

It is an arithmetic number, because the mean of its divisors is an integer number (677040).

Almost surely, 2^11121420 is an apocalyptic number.

11121420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11121420 is an abundant number, since it is smaller than the sum of its proper divisors (21376500).

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

11121420 is a wasteful number, since it uses less digits than its factorization.

11121420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8094 (or 8092 counting only the distinct ones).

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

The square root of 11121420 is about 3334.8793081609. The cubic root of 11121420 is about 223.2133064612.

Adding to 11121420 its reverse (2412111), we get a palindrome (13533531).

The spelling of 11121420 in words is "eleven million, one hundred twenty-one thousand, four hundred twenty".