221330031001 has 4 divisors (see below), whose sum is σ = 222305053392. Its totient is φ = 220355008612.

The previous prime is 221330030969. The next prime is 221330031011. The reversal of 221330031001 is 100130033122.

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 not a de Polignac number, because 221330031001 - 2⁵ = 221330030969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221330031011) 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, 487510855 + ... + 487511308.

It is an arithmetic number, because the mean of its divisors is an integer number (55576263348).

Almost surely, 2^221330031001 is an apocalyptic number.

It is an amenable number.

221330031001 is a deficient number, since it is larger than the sum of its proper divisors (975022391).

221330031001 is an equidigital number, since it uses as much as digits as its factorization.

221330031001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975022390.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 221330031001 its reverse (100130033122), we get a palindrome (321460064123).

The spelling of 221330031001 in words is "two hundred twenty-one billion, three hundred thirty million, thirty-one thousand, one".