1000033331221 has 4 divisors (see below), whose sum is σ = 1000063680192. Its totient is φ = 1000002982252.

The previous prime is 1000033331203. The next prime is 1000033331303. The reversal of 1000033331221 is 1221333300001.

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 a de Polignac number, because none of the positive numbers 2^k-1000033331221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000033331821) 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, 15125005 + ... + 15190978.

It is an arithmetic number, because the mean of its divisors is an integer number (250015920048).

Almost surely, 2^{1000033331221} is an apocalyptic number.

It is an amenable number.

1000033331221 is a deficient number, since it is larger than the sum of its proper divisors (30348971).

1000033331221 is an equidigital number, since it uses as much as digits as its factorization.

1000033331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30348970.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 1000033331221 its reverse (1221333300001), we get a palindrome (2221366631222).

The spelling of 1000033331221 in words is "one trillion, thirty-three million, three hundred thirty-one thousand, two hundred twenty-one".