221430212244402 has 64 divisors (see below), whose sum is σ = 507753199810560. Its totient is φ = 63062407833984.

The previous prime is 221430212244383. The next prime is 221430212244413. The reversal of 221430212244402 is 204442212034122.

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, 824685249 + ... + 824953707.

It is an arithmetic number, because the mean of its divisors is an integer number (7933643747040).

Almost surely, 2^{221430212244402} is an apocalyptic number.

221430212244402 is an abundant number, since it is smaller than the sum of its proper divisors (286322987566158).

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

221430212244402 is a wasteful number, since it uses less digits than its factorization.

221430212244402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331527.

The product of its (nonzero) digits is 49152, while the sum is 33.

Adding to 221430212244402 its reverse (204442212034122), we get a palindrome (425872424278524).

The spelling of 221430212244402 in words is "two hundred twenty-one trillion, four hundred thirty billion, two hundred twelve million, two hundred forty-four thousand, four hundred two".