221331033001 has 4 divisors (see below), whose sum is σ = 238356497092. Its totient is φ = 204305568912.

The previous prime is 221331032987. The next prime is 221331033029. The reversal of 221331033001 is 100330133122.

221331033001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 107964816400 + 113366216601 = 328580^2 + 336699^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221331033001 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 221331033001.

It is not an unprimeable number, because it can be changed into a prime (221331031001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8512732026 + ... + 8512732051.

It is an arithmetic number, because the mean of its divisors is an integer number (59589124273).

Almost surely, 2^221331033001 is an apocalyptic number.

It is an amenable number.

221331033001 is a deficient number, since it is larger than the sum of its proper divisors (17025464091).

221331033001 is a wasteful number, since it uses less digits than its factorization.

221331033001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17025464090.

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

Adding to 221331033001 its reverse (100330133122), we get a palindrome (321661166123).

The spelling of 221331033001 in words is "two hundred twenty-one billion, three hundred thirty-one million, thirty-three thousand, one".