221001302231 has 4 divisors (see below), whose sum is σ = 221003874312. Its totient is φ = 220998730152.

The previous prime is 221001302213. The next prime is 221001302237. The reversal of 221001302231 is 132203100122.

221001302231 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 is a cyclic number.

It is not a de Polignac number, because 221001302231 - 2¹⁰ = 221001301207 is a prime.

It is a super-2 number, since 2×221001302231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001302237) 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, 1152536 + ... + 1330541.

It is an arithmetic number, because the mean of its divisors is an integer number (55250968578).

Almost surely, 2^221001302231 is an apocalyptic number.

221001302231 is a deficient number, since it is larger than the sum of its proper divisors (2572081).

221001302231 is an equidigital number, since it uses as much as digits as its factorization.

221001302231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2572080.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 221001302231 its reverse (132203100122), we get a palindrome (353204402353).

The spelling of 221001302231 in words is "two hundred twenty-one billion, one million, three hundred two thousand, two hundred thirty-one".