11121340420 has 48 divisors (see below), whose sum is σ = 24399543168. Its totient is φ = 4250005760.

The previous prime is 11121340369. The next prime is 11121340423. The reversal of 11121340420 is 2404312111.

It is not an unprimeable number, because it can be changed into a prime (11121340423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 380115 + ... + 408325.

It is an arithmetic number, because the mean of its divisors is an integer number (508323816).

Almost surely, 2^11121340420 is an apocalyptic number.

11121340420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11121340420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12199771584).

11121340420 is an abundant number, since it is smaller than the sum of its proper divisors (13278202748).

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

11121340420 is a wasteful number, since it uses less digits than its factorization.

11121340420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29100 (or 29098 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 11121340420 its reverse (2404312111), we get a palindrome (13525652531).

It can be divided in two parts, 11121 and 340420, that added together give a triangular number (351541 = T₈₃₈).

The spelling of 11121340420 in words is "eleven billion, one hundred twenty-one million, three hundred forty thousand, four hundred twenty".