9033131021 has 4 divisors (see below), whose sum is σ = 9425875872. Its totient is φ = 8640386172.

The previous prime is 9033130963. The next prime is 9033131039. The reversal of 9033131021 is 1201313309.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1201313309 = 7 ⋅171616187.

It is not a de Polignac number, because 9033131021 - 2²² = 9028936717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 392744827 = 9033131021 / (9 + 0 + 3 + 3 + 1 + 3 + 1 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9033131071) 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, 196372391 + ... + 196372436.

It is an arithmetic number, because the mean of its divisors is an integer number (2356468968).

Almost surely, 2^9033131021 is an apocalyptic number.

It is an amenable number.

9033131021 is a deficient number, since it is larger than the sum of its proper divisors (392744851).

9033131021 is a wasteful number, since it uses less digits than its factorization.

9033131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392744850.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 9033131021 is about 95042.7852127662. The cubic root of 9033131021 is about 2082.6331159820.

The spelling of 9033131021 in words is "nine billion, thirty-three million, one hundred thirty-one thousand, twenty-one".