221301132021231 has 4 divisors (see below), whose sum is σ = 295068176028312. Its totient is φ = 147534088014152.

The previous prime is 221301132021173. The next prime is 221301132021239. The reversal of 221301132021231 is 132120231103122.

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 221301132021231 - 2¹¹ = 221301132019183 is a prime.

It is a super-2 number, since 2×221301132021231² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221301132021239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36883522003536 + ... + 36883522003541.

It is an arithmetic number, because the mean of its divisors is an integer number (73767044007078).

Almost surely, 2^{221301132021231} is an apocalyptic number.

221301132021231 is a deficient number, since it is larger than the sum of its proper divisors (73767044007081).

221301132021231 is an equidigital number, since it uses as much as digits as its factorization.

221301132021231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73767044007080.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 221301132021231 its reverse (132120231103122), we get a palindrome (353421363124353).

The spelling of 221301132021231 in words is "two hundred twenty-one trillion, three hundred one billion, one hundred thirty-two million, twenty-one thousand, two hundred thirty-one".