221434331213 has 8 divisors (see below), whose sum is σ = 222611964288. Its totient is φ = 220257010944.

The previous prime is 221434331207. The next prime is 221434331231. The reversal of 221434331213 is 312133434122.

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 221434331213 - 2¹² = 221434327117 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 (221434331243) 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, 1417070 + ... + 1565552.

It is an arithmetic number, because the mean of its divisors is an integer number (27826495536).

Almost surely, 2^221434331213 is an apocalyptic number.

It is an amenable number.

221434331213 is a deficient number, since it is larger than the sum of its proper divisors (1177633075).

221434331213 is a wasteful number, since it uses less digits than its factorization.

221434331213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156403.

The product of its digits is 10368, while the sum is 29.

Adding to 221434331213 its reverse (312133434122), we get a palindrome (533567765335).

The spelling of 221434331213 in words is "two hundred twenty-one billion, four hundred thirty-four million, three hundred thirty-one thousand, two hundred thirteen".