221213104321005 has 256 divisors, whose sum is σ = 424046439290880. Its totient is φ = 109140103987200.

The previous prime is 221213104320983. The next prime is 221213104321061. The reversal of 221213104321005 is 500123401312122.

It is a happy number.

221213104321005 is a `hidden beast` number, since 2 + 2 + 1 + 21 + 310 + 4 + 321 + 0 + 0 + 5 = 666.

It is not a de Polignac number, because 221213104321005 - 2¹³ = 221213104312813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 221213104321005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 8654308425 + ... + 8654333985.

It is an arithmetic number, because the mean of its divisors is an integer number (1656431403480).

Almost surely, 2^{221213104321005} is an apocalyptic number.

It is an amenable number.

221213104321005 is a deficient number, since it is larger than the sum of its proper divisors (202833334969875).

221213104321005 is a wasteful number, since it uses less digits than its factorization.

221213104321005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26229 (or 26223 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 221213104321005 its reverse (500123401312122), we get a palindrome (721336505633127).

The spelling of 221213104321005 in words is "two hundred twenty-one trillion, two hundred thirteen billion, one hundred four million, three hundred twenty-one thousand, five".