221021321300111 has 4 divisors (see below), whose sum is σ = 221028319442112. Its totient is φ = 221014323158112.

The previous prime is 221021321300071. The next prime is 221021321300141. The reversal of 221021321300111 is 111003123120122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221021321300111 is a prime.

It is a super-2 number, since 2×221021321300111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221021321300141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3499023626 + ... + 3499086791.

It is an arithmetic number, because the mean of its divisors is an integer number (55257079860528).

Almost surely, 2^{221021321300111} is an apocalyptic number.

221021321300111 is a deficient number, since it is larger than the sum of its proper divisors (6998142001).

221021321300111 is an equidigital number, since it uses as much as digits as its factorization.

221021321300111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6998142000.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 221021321300111 its reverse (111003123120122), we get a palindrome (332024444420233).

The spelling of 221021321300111 in words is "two hundred twenty-one trillion, twenty-one billion, three hundred twenty-one million, three hundred thousand, one hundred eleven".