221312144342431 has 4 divisors (see below), whose sum is σ = 228451245772864. Its totient is φ = 214173042912000.

The previous prime is 221312144342413. The next prime is 221312144342573. The reversal of 221312144342431 is 134243441213122.

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 221312144342431 - 2²⁷ = 221312010124703 is a prime.

It is a super-2 number, since 2×221312144342431² (a number of 29 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 (221312144342231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3569550715170 + ... + 3569550715231.

It is an arithmetic number, because the mean of its divisors is an integer number (57112811443216).

Almost surely, 2^{221312144342431} is an apocalyptic number.

221312144342431 is a deficient number, since it is larger than the sum of its proper divisors (7139101430433).

221312144342431 is an equidigital number, since it uses as much as digits as its factorization.

221312144342431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7139101430432.

The product of its digits is 110592, while the sum is 37.

Adding to 221312144342431 its reverse (134243441213122), we get a palindrome (355555585555553).

The spelling of 221312144342431 in words is "two hundred twenty-one trillion, three hundred twelve billion, one hundred forty-four million, three hundred forty-two thousand, four hundred thirty-one".