221434120232 has 32 divisors (see below), whose sum is σ = 451553606280. Its totient is φ = 101188473600.

The previous prime is 221434120231. The next prime is 221434120273. The reversal of 221434120232 is 232021434122.

It can be written as a sum of positive squares in 4 ways, for example, as 201390922756 + 20043197476 = 448766^2 + 141574^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (221434120231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10529963 + ... + 10550970.

Almost surely, 2^221434120232 is an apocalyptic number.

It is an amenable number.

221434120232 is an abundant number, since it is smaller than the sum of its proper divisors (230119486048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221434120232 is a wasteful number, since it uses less digits than its factorization.

221434120232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21081053 (or 21081049 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 221434120232 its reverse (232021434122), we get a palindrome (453455554354).

The spelling of 221434120232 in words is "two hundred twenty-one billion, four hundred thirty-four million, one hundred twenty thousand, two hundred thirty-two".