11333231021 has 6 divisors (see below), whose sum is σ = 13183554510. Its totient is φ = 9714197976.

The previous prime is 11333231003. The next prime is 11333231051. The reversal of 11333231021 is 12013233311.

It can be written as a sum of positive squares in only one way, i.e., 7644004900 + 3689226121 = 87430^2 + 60739^2 .

It is not a de Polignac number, because 11333231021 - 2⁶ = 11333230957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11333230984 and 11333231002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11333231051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 115645166 + ... + 115645263.

It is an arithmetic number, because the mean of its divisors is an integer number (2197259085).

Almost surely, 2^11333231021 is an apocalyptic number.

It is an amenable number.

11333231021 is a deficient number, since it is larger than the sum of its proper divisors (1850323489).

11333231021 is an equidigital number, since it uses as much as digits as its factorization.

11333231021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231290443 (or 231290436 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 11333231021 its reverse (12013233311), we get a palindrome (23346464332).

The spelling of 11333231021 in words is "eleven billion, three hundred thirty-three million, two hundred thirty-one thousand, twenty-one".