221222402340 has 24 divisors (see below), whose sum is σ = 619422726720. Its totient is φ = 58992640608.

The previous prime is 221222402287. The next prime is 221222402389. The reversal of 221222402340 is 43204222122.

It is a self number, because there is not a number n which added to its sum of digits gives 221222402340.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1843519960 + ... + 1843520079.

It is an arithmetic number, because the mean of its divisors is an integer number (25809280280).

Almost surely, 2^221222402340 is an apocalyptic number.

221222402340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221222402340 is an abundant number, since it is smaller than the sum of its proper divisors (398200324380).

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

221222402340 is a wasteful number, since it uses less digits than its factorization.

221222402340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3687040051 (or 3687040049 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 221222402340 its reverse (43204222122), we get a palindrome (264426624462).

The spelling of 221222402340 in words is "two hundred twenty-one billion, two hundred twenty-two million, four hundred two thousand, three hundred forty".