221132668504 has 64 divisors (see below), whose sum is σ = 476848995840. Its totient is φ = 95153372160.

The previous prime is 221132668483. The next prime is 221132668507. The reversal of 221132668504 is 405866231122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221132668507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 366844 + ... + 759499.

It is an arithmetic number, because the mean of its divisors is an integer number (7450765560).

Almost surely, 2^221132668504 is an apocalyptic number.

It is an amenable number.

221132668504 is an abundant number, since it is smaller than the sum of its proper divisors (255716327336).

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

221132668504 is a wasteful number, since it uses less digits than its factorization.

221132668504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126480 (or 1126476 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

Adding to 221132668504 its reverse (405866231122), we get a palindrome (626998899626).

The spelling of 221132668504 in words is "two hundred twenty-one billion, one hundred thirty-two million, six hundred sixty-eight thousand, five hundred four".