221984934913 has 8 divisors (see below), whose sum is σ = 267049545920. Its totient is φ = 180258443280.

The previous prime is 221984934893. The next prime is 221984934917. The reversal of 221984934913 is 319439489122.

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 a de Polignac number, because none of the positive numbers 2^k-221984934913 is a prime.

It is a super-2 number, since 2×221984934913² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221984934917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 834529698 + ... + 834529963.

It is an arithmetic number, because the mean of its divisors is an integer number (33381193240).

Almost surely, 2^221984934913 is an apocalyptic number.

It is an amenable number.

221984934913 is a deficient number, since it is larger than the sum of its proper divisors (45064611007).

221984934913 is a wasteful number, since it uses less digits than its factorization.

221984934913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1669059687.

The product of its digits is 3359232, while the sum is 55.

The spelling of 221984934913 in words is "two hundred twenty-one billion, nine hundred eighty-four million, nine hundred thirty-four thousand, nine hundred thirteen".