221333122013 has 4 divisors (see below), whose sum is σ = 222479925948. Its totient is φ = 220186318080.

The previous prime is 221333121941. The next prime is 221333122033. The reversal of 221333122013 is 310221333122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 156102429604 + 65230692409 = 395098^2 + 255403^2 .

It is a cyclic number.

It is not a de Polignac number, because 221333122013 - 2¹² = 221333117917 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 221333122013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221333122033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573401678 + ... + 573402063.

It is an arithmetic number, because the mean of its divisors is an integer number (55619981487).

Almost surely, 2^221333122013 is an apocalyptic number.

It is an amenable number.

221333122013 is a deficient number, since it is larger than the sum of its proper divisors (1146803935).

221333122013 is a wasteful number, since it uses less digits than its factorization.

221333122013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146803934.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 221333122013 its reverse (310221333122), we get a palindrome (531554455135).

The spelling of 221333122013 in words is "two hundred twenty-one billion, three hundred thirty-three million, one hundred twenty-two thousand, thirteen".