11220003121 has 8 divisors (see below), whose sum is σ = 11304616104. Its totient is φ = 11135429760.

The previous prime is 11220003089. The next prime is 11220003127. The reversal of 11220003121 is 12130002211.

It can be written as a sum of positive squares in 4 ways, for example, as 2597023521 + 8622979600 = 50961^2 + 92860^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11220003121 - 2⁵ = 11220003089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11220003127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 812551 + ... + 826243.

It is an arithmetic number, because the mean of its divisors is an integer number (1413077013).

Almost surely, 2^11220003121 is an apocalyptic number.

It is an amenable number.

11220003121 is a deficient number, since it is larger than the sum of its proper divisors (84612983).

11220003121 is a wasteful number, since it uses less digits than its factorization.

11220003121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19811.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 11220003121 its reverse (12130002211), we get a palindrome (23350005332).

The spelling of 11220003121 in words is "eleven billion, two hundred twenty million, three thousand, one hundred twenty-one".