11331001021 has 4 divisors (see below), whose sum is σ = 11417497344. Its totient is φ = 11244504700.

The previous prime is 11331001001. The next prime is 11331001049. The reversal of 11331001021 is 12010013311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11331001021 - 2²⁷ = 11196783293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11331000992 and 11331001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331001001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43247965 + ... + 43248226.

It is an arithmetic number, because the mean of its divisors is an integer number (2854374336).

Almost surely, 2^11331001021 is an apocalyptic number.

It is an amenable number.

11331001021 is a deficient number, since it is larger than the sum of its proper divisors (86496323).

11331001021 is an equidigital number, since it uses as much as digits as its factorization.

11331001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86496322.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 11331001021 its reverse (12010013311), we get a palindrome (23341014332).

The spelling of 11331001021 in words is "eleven billion, three hundred thirty-one million, one thousand, twenty-one".