221421203570240 has 112 divisors (see below), whose sum is σ = 550192712647680. Its totient is φ = 84716267919360.

The previous prime is 221421203570239. The next prime is 221421203570243. The reversal of 221421203570240 is 42075302124122.

It is a super-2 number, since 2×221421203570240² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221421203570240.

It is not an unprimeable number, because it can be changed into a prime (221421203570243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 513667121 + ... + 514097999.

Almost surely, 2^{221421203570240} is an apocalyptic number.

221421203570240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221421203570240 is an abundant number, since it is smaller than the sum of its proper divisors (328771509077440).

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

221421203570240 is a wasteful number, since it uses less digits than its factorization.

221421203570240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500740 (or 500730 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 35.

Adding to 221421203570240 its reverse (42075302124122), we get a palindrome (263496505694362).

The spelling of 221421203570240 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred three million, five hundred seventy thousand, two hundred forty".