221221430121304 has 16 divisors (see below), whose sum is σ = 415008377287920. Its totient is φ = 110552529511200.

The previous prime is 221221430121299. The next prime is 221221430121317. The reversal of 221221430121304 is 403121034122122.

It is a super-2 number, since 2×221221430121304² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7273177524 + ... + 7273207939.

It is an arithmetic number, because the mean of its divisors is an integer number (25938023580495).

Almost surely, 2^{221221430121304} is an apocalyptic number.

It is an amenable number.

221221430121304 is a deficient number, since it is larger than the sum of its proper divisors (193786947166616).

221221430121304 is a wasteful number, since it uses less digits than its factorization.

221221430121304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14546387370 (or 14546387366 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 221221430121304 its reverse (403121034122122), we get a palindrome (624342464243426).

The spelling of 221221430121304 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, four hundred thirty million, one hundred twenty-one thousand, three hundred four".