221421203312401 has 8 divisors (see below), whose sum is σ = 227077438339584. Its totient is φ = 215777145326880.

The previous prime is 221421203312389. The next prime is 221421203312411. The reversal of 221421203312401 is 104213302124122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221421203312401 - 2²³ = 221421194923793 is a prime.

It is a super-3 number, since 3×221421203312401³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221421203312401.

It is not an unprimeable number, because it can be changed into a prime (221421203312411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3044223585 + ... + 3044296318.

It is an arithmetic number, because the mean of its divisors is an integer number (28384679792448).

Almost surely, 2^{221421203312401} is an apocalyptic number.

It is an amenable number.

221421203312401 is a deficient number, since it is larger than the sum of its proper divisors (5656235027183).

221421203312401 is an equidigital number, since it uses as much as digits as its factorization.

221421203312401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6088520831.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 221421203312401 its reverse (104213302124122), we get a palindrome (325634505436523).

The spelling of 221421203312401 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred three million, three hundred twelve thousand, four hundred one".