221420304321211 has 8 divisors (see below), whose sum is σ = 223015134330800. Its totient is φ = 219825501143040.

The previous prime is 221420304321197. The next prime is 221420304321233. The reversal of 221420304321211 is 112123403024122.

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 221420304321211 - 2⁵ = 221420304321179 is a prime.

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 221420304321211.

It is not an unprimeable number, because it can be changed into a prime (221420304321311) 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, 10005571 + ... + 23301331.

It is an arithmetic number, because the mean of its divisors is an integer number (27876891791350).

Almost surely, 2^{221420304321211} is an apocalyptic number.

221420304321211 is a deficient number, since it is larger than the sum of its proper divisors (1594830009589).

221420304321211 is a wasteful number, since it uses less digits than its factorization.

221420304321211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13415709.

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

Adding to 221420304321211 its reverse (112123403024122), we get a palindrome (333543707345333).

The spelling of 221420304321211 in words is "two hundred twenty-one trillion, four hundred twenty billion, three hundred four million, three hundred twenty-one thousand, two hundred eleven".