33012131011021 has 4 divisors (see below), whose sum is σ = 33055059660700. Its totient is φ = 32969202361344.

The previous prime is 33012131011019. The next prime is 33012131011081. The reversal of 33012131011021 is 12011013121033.

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 16869502562500 + 16142628448521 = 4107250^2 + 4017789^2 .

It is a cyclic number.

It is not a de Polignac number, because 33012131011021 - 2¹ = 33012131011019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33012131011021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33012131011081) 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, 21464323686 + ... + 21464325223.

It is an arithmetic number, because the mean of its divisors is an integer number (8263764915175).

Almost surely, 2^{33012131011021} is an apocalyptic number.

It is an amenable number.

33012131011021 is a deficient number, since it is larger than the sum of its proper divisors (42928649679).

33012131011021 is an equidigital number, since it uses as much as digits as its factorization.

33012131011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42928649678.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 33012131011021 its reverse (12011013121033), we get a palindrome (45023144132054).

The spelling of 33012131011021 in words is "thirty-three trillion, twelve billion, one hundred thirty-one million, eleven thousand, twenty-one".