221323340140 has 72 divisors (see below), whose sum is σ = 542982297312. Its totient is φ = 75556535040.

The previous prime is 221323340107. The next prime is 221323340141. The reversal of 221323340140 is 41043323122.

It is a super-2 number, since 2×221323340140² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221323340141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 256296 + ... + 712975.

It is an arithmetic number, because the mean of its divisors is an integer number (7541420796).

Almost surely, 2^221323340140 is an apocalyptic number.

221323340140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221323340140 is an abundant number, since it is smaller than the sum of its proper divisors (321658957172).

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

221323340140 is a wasteful number, since it uses less digits than its factorization.

221323340140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969527 (or 969518 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 221323340140 its reverse (41043323122), we get a palindrome (262366663262).

The spelling of 221323340140 in words is "two hundred twenty-one billion, three hundred twenty-three million, three hundred forty thousand, one hundred forty".