221442132340 has 96 divisors (see below), whose sum is σ = 546860321280. Its totient is φ = 74257689600.

The previous prime is 221442132287. The next prime is 221442132397. The reversal of 221442132340 is 43231244122.

It is a junction number, because it is equal to n+sod(n) for n = 221442132299 and 221442132308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2934280 + ... + 3008800.

It is an arithmetic number, because the mean of its divisors is an integer number (5696461680).

Almost surely, 2^221442132340 is an apocalyptic number.

221442132340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221442132340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273430160640).

221442132340 is an abundant number, since it is smaller than the sum of its proper divisors (325418188940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221442132340 is a wasteful number, since it uses less digits than its factorization.

221442132340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75593 (or 75591 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 221442132340 its reverse (43231244122), we get a palindrome (264673376462).

The spelling of 221442132340 in words is "two hundred twenty-one billion, four hundred forty-two million, one hundred thirty-two thousand, three hundred forty".