221403320234 has 16 divisors (see below), whose sum is σ = 336744760968. Its totient is φ = 109165012992.

The previous prime is 221403320231. The next prime is 221403320239. The reversal of 221403320234 is 432023304122.

221403320234 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 144700356025 + 76702964209 = 380395^2 + 276953^2 .

It is not an unprimeable number, because it can be changed into a prime (221403320231) 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, 2441927 + ... + 2530970.

Almost surely, 2^221403320234 is an apocalyptic number.

221403320234 is a deficient number, since it is larger than the sum of its proper divisors (115341440734).

221403320234 is a wasteful number, since it uses less digits than its factorization.

221403320234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4973209.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 221403320234 its reverse (432023304122), we get a palindrome (653426624356).

The spelling of 221403320234 in words is "two hundred twenty-one billion, four hundred three million, three hundred twenty thousand, two hundred thirty-four".