11303312021 has 16 divisors (see below), whose sum is σ = 12128870400. Its totient is φ = 10502622000.

The previous prime is 11303311993. The next prime is 11303312023. The reversal of 11303312021 is 12021330311.

It is a cyclic number.

It is not a de Polignac number, because 11303312021 - 2²⁶ = 11236203157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11303312023) 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, 201716 + ... + 251586.

It is an arithmetic number, because the mean of its divisors is an integer number (758054400).

Almost surely, 2^11303312021 is an apocalyptic number.

It is an amenable number.

11303312021 is a deficient number, since it is larger than the sum of its proper divisors (825558379).

11303312021 is a wasteful number, since it uses less digits than its factorization.

11303312021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50120.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 11303312021 its reverse (12021330311), we get a palindrome (23324642332).

The spelling of 11303312021 in words is "eleven billion, three hundred three million, three hundred twelve thousand, twenty-one".