221342310402 has 32 divisors (see below), whose sum is σ = 468786543552. Its totient is φ = 69431591424.

The previous prime is 221342310401. The next prime is 221342310479. The reversal of 221342310402 is 204013243122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221342310401) 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 15 ways as a sum of consecutive naturals, for example, 658533 + ... + 936135.

It is an arithmetic number, because the mean of its divisors is an integer number (14649579486).

Almost surely, 2^221342310402 is an apocalyptic number.

221342310402 is an abundant number, since it is smaller than the sum of its proper divisors (247444233150).

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

221342310402 is a wasteful number, since it uses less digits than its factorization.

221342310402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285442.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 221342310402 its reverse (204013243122), we get a palindrome (425355553524).

The spelling of 221342310402 in words is "two hundred twenty-one billion, three hundred forty-two million, three hundred ten thousand, four hundred two".