221321131013 has 8 divisors (see below), whose sum is σ = 228509498880. Its totient is φ = 214135824240.

The previous prime is 221321130983. The next prime is 221321131061. The reversal of 221321131013 is 310131123122.

It is a happy number.

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 221321131013 - 2²⁰ = 221320082437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221321151013) 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 7 ways as a sum of consecutive naturals, for example, 617870 + ... + 907967.

It is an arithmetic number, because the mean of its divisors is an integer number (28563687360).

Almost surely, 2^221321131013 is an apocalyptic number.

It is an amenable number.

221321131013 is a deficient number, since it is larger than the sum of its proper divisors (7188367867).

221321131013 is a wasteful number, since it uses less digits than its factorization.

221321131013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530547.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 221321131013 its reverse (310131123122), we get a palindrome (531452254135).

The spelling of 221321131013 in words is "two hundred twenty-one billion, three hundred twenty-one million, one hundred thirty-one thousand, thirteen".