11220445421 has 16 divisors (see below), whose sum is σ = 11865268800. Its totient is φ = 10581177600.

The previous prime is 11220445409. The next prime is 11220445427. The reversal of 11220445421 is 12454402211.

It is a cyclic number.

It is not a de Polignac number, because 11220445421 - 2²² = 11216251117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220445427) 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, 4299365 + ... + 4301973.

It is an arithmetic number, because the mean of its divisors is an integer number (741579300).

Almost surely, 2^11220445421 is an apocalyptic number.

It is an amenable number.

11220445421 is a deficient number, since it is larger than the sum of its proper divisors (644823379).

11220445421 is a wasteful number, since it uses less digits than its factorization.

11220445421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3580.

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 11220445421 its reverse (12454402211), we get a palindrome (23674847632).

The spelling of 11220445421 in words is "eleven billion, two hundred twenty million, four hundred forty-five thousand, four hundred twenty-one".