221311231004 has 12 divisors (see below), whose sum is σ = 388189102224. Its totient is φ = 110400058944.

The previous prime is 221311231003. The next prime is 221311231033. The reversal of 221311231004 is 400132113122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221311231003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63887192 + ... + 63890655.

It is an arithmetic number, because the mean of its divisors is an integer number (32349091852).

Almost surely, 2^221311231004 is an apocalyptic number.

It is an amenable number.

221311231004 is a deficient number, since it is larger than the sum of its proper divisors (166877871220).

221311231004 is a wasteful number, since it uses less digits than its factorization.

221311231004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127778284 (or 127778282 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 221311231004 its reverse (400132113122), we get a palindrome (621443344126).

The spelling of 221311231004 in words is "two hundred twenty-one billion, three hundred eleven million, two hundred thirty-one thousand, four".