221234343402 has 64 divisors (see below), whose sum is σ = 476009892864. Its totient is φ = 68302329600.

The previous prime is 221234343389. The next prime is 221234343443. The reversal of 221234343402 is 204343432122.

It is a self number, because there is not a number n which added to its sum of digits gives 221234343402.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1580893 + ... + 1715135.

It is an arithmetic number, because the mean of its divisors is an integer number (7437654576).

Almost surely, 2^221234343402 is an apocalyptic number.

221234343402 is an abundant number, since it is smaller than the sum of its proper divisors (254775549462).

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

221234343402 is a wasteful number, since it uses less digits than its factorization.

221234343402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134523.

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 221234343402 its reverse (204343432122), we get a palindrome (425577775524).

The spelling of 221234343402 in words is "two hundred twenty-one billion, two hundred thirty-four million, three hundred forty-three thousand, four hundred two".