11221421240 has 64 divisors (see below), whose sum is σ = 27254491200. Its totient is φ = 4145354752.

The previous prime is 11221421219. The next prime is 11221421249. The reversal of 11221421240 is 4212412211.

11221421240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221421249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183617 + ... + 236976.

It is an arithmetic number, because the mean of its divisors is an integer number (425851425).

Almost surely, 2^11221421240 is an apocalyptic number.

11221421240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221421240 is an abundant number, since it is smaller than the sum of its proper divisors (16033069960).

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

11221421240 is a wasteful number, since it uses less digits than its factorization.

11221421240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420656 (or 420652 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 11221421240 its reverse (4212412211), we get a palindrome (15433833451).

The spelling of 11221421240 in words is "eleven billion, two hundred twenty-one million, four hundred twenty-one thousand, two hundred forty".