221421203570252 has 96 divisors (see below), whose sum is σ = 451396123315200. Its totient is φ = 93069534615552.

The previous prime is 221421203570243. The next prime is 221421203570261. The reversal of 221421203570252 is 252075302124122.

It is an interprime number because it is at equal distance from previous prime (221421203570243) and next prime (221421203570261).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1675932548 + ... + 1676064660.

It is an arithmetic number, because the mean of its divisors is an integer number (4702042951200).

Almost surely, 2^{221421203570252} is an apocalyptic number.

It is an amenable number.

221421203570252 is an abundant number, since it is smaller than the sum of its proper divisors (229974919744948).

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

221421203570252 is a wasteful number, since it uses less digits than its factorization.

221421203570252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134535 (or 134533 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 38.

Adding to 221421203570252 its reverse (252075302124122), we get a palindrome (473496505694374).

The spelling of 221421203570252 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred three million, five hundred seventy thousand, two hundred fifty-two".