221142324401 has 4 divisors (see below), whose sum is σ = 221151089472. Its totient is φ = 221133559332.

The previous prime is 221142324383. The next prime is 221142324419. The reversal of 221142324401 is 104423241122.

221142324401 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (221142324383) and next prime (221142324419).

It is a cyclic number.

It is not a de Polignac number, because 221142324401 - 2¹⁰ = 221142323377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221142324461) 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, 4344581 + ... + 4395186.

It is an arithmetic number, because the mean of its divisors is an integer number (55287772368).

Almost surely, 2^221142324401 is an apocalyptic number.

It is an amenable number.

221142324401 is a deficient number, since it is larger than the sum of its proper divisors (8765071).

221142324401 is an equidigital number, since it uses as much as digits as its factorization.

221142324401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8765070.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 221142324401 its reverse (104423241122), we get a palindrome (325565565523).

The spelling of 221142324401 in words is "two hundred twenty-one billion, one hundred forty-two million, three hundred twenty-four thousand, four hundred one".