221331013322221 has 4 divisors (see below), whose sum is σ = 241452014533344. Its totient is φ = 201210012111100.

The previous prime is 221331013322191. The next prime is 221331013322257. The reversal of 221331013322221 is 122223310133122.

221331013322221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221331013322221 - 2⁷ = 221331013322093 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 221331013322221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221331013322621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10060500605545 + ... + 10060500605566.

It is an arithmetic number, because the mean of its divisors is an integer number (60363003633336).

Almost surely, 2^{221331013322221} is an apocalyptic number.

It is an amenable number.

221331013322221 is a deficient number, since it is larger than the sum of its proper divisors (20121001211123).

221331013322221 is a wasteful number, since it uses less digits than its factorization.

221331013322221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20121001211122.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 221331013322221 its reverse (122223310133122), we get a palindrome (343554323455343).

The spelling of 221331013322221 in words is "two hundred twenty-one trillion, three hundred thirty-one billion, thirteen million, three hundred twenty-two thousand, two hundred twenty-one".