221984934914 has 4 divisors (see below), whose sum is σ = 332977402374. Its totient is φ = 110992467456.

The previous prime is 221984934893. The next prime is 221984934917. The reversal of 221984934914 is 419439489122.

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

It can be written as a sum of positive squares in only one way, i.e., 210107640625 + 11877294289 = 458375^2 + 108983^2 .

It is a super-2 number, since 2×221984934914² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221984934914.

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 as a sum of consecutive naturals, namely, 55496233727 + ... + 55496233730.

Almost surely, 2^221984934914 is an apocalyptic number.

221984934914 is a deficient number, since it is larger than the sum of its proper divisors (110992467460).

221984934914 is a wasteful number, since it uses less digits than its factorization.

221984934914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110992467459.

The product of its digits is 4478976, while the sum is 56.

The spelling of 221984934914 in words is "two hundred twenty-one billion, nine hundred eighty-four million, nine hundred thirty-four thousand, nine hundred fourteen".