221646332131342 has 4 divisors (see below), whose sum is σ = 332469498197016. Its totient is φ = 110823166065670.

The previous prime is 221646332131339. The next prime is 221646332131369. The reversal of 221646332131342 is 243131233646122.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55411583032834 + ... + 55411583032837.

It is an arithmetic number, because the mean of its divisors is an integer number (83117374549254).

Almost surely, 2^{221646332131342} is an apocalyptic number.

221646332131342 is a deficient number, since it is larger than the sum of its proper divisors (110823166065674).

221646332131342 is a wasteful number, since it uses less digits than its factorization.

221646332131342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110823166065673.

The product of its digits is 746496, while the sum is 43.

Adding to 221646332131342 its reverse (243131233646122), we get a palindrome (464777565777464).

The spelling of 221646332131342 in words is "two hundred twenty-one trillion, six hundred forty-six billion, three hundred thirty-two million, one hundred thirty-one thousand, three hundred forty-two".