221331221342 has 16 divisors (see below), whose sum is σ = 413918128512. Its totient is φ = 86232943320.

The previous prime is 221331221341. The next prime is 221331221399. The reversal of 221331221342 is 243122133122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221331221341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 718607708 + ... + 718608015.

It is an arithmetic number, because the mean of its divisors is an integer number (25869883032).

Almost surely, 2^221331221342 is an apocalyptic number.

221331221342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221331221342 is a deficient number, since it is larger than the sum of its proper divisors (192586907170).

221331221342 is a wasteful number, since it uses less digits than its factorization.

221331221342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437215743.

The product of its digits is 3456, while the sum is 26.

Adding to 221331221342 its reverse (243122133122), we get a palindrome (464453354464).

The spelling of 221331221342 in words is "two hundred twenty-one billion, three hundred thirty-one million, two hundred twenty-one thousand, three hundred forty-two".