1133500021 has 4 divisors (see below), whose sum is σ = 1133648044. Its totient is φ = 1133352000.

The previous prime is 1133500009. The next prime is 1133500057. The reversal of 1133500021 is 1200053311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 556299396 + 577200625 = 23586^2 + 24025^2 .

It is a cyclic number.

It is not a de Polignac number, because 1133500021 - 2²³ = 1125111413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1133499968 and 1133500004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1133500091) 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, 61860 + ... + 78061.

It is an arithmetic number, because the mean of its divisors is an integer number (283412011).

Almost surely, 2^1133500021 is an apocalyptic number.

It is an amenable number.

1133500021 is a deficient number, since it is larger than the sum of its proper divisors (148023).

1133500021 is an equidigital number, since it uses as much as digits as its factorization.

1133500021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148022.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 1133500021 is about 33667.4920509384. The cubic root of 1133500021 is about 1042.6547134124.

Adding to 1133500021 its reverse (1200053311), we get a palindrome (2333553332).

The spelling of 1133500021 in words is "one billion, one hundred thirty-three million, five hundred thousand, twenty-one".