221311231010 has 16 divisors (see below), whose sum is σ = 401401135872. Its totient is φ = 87848732400.

The previous prime is 221311231003. The next prime is 221311231033. The reversal of 221311231010 is 10132113122.

It is a self number, because there is not a number n which added to its sum of digits gives 221311231010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84468626 + ... + 84471245.

It is an arithmetic number, because the mean of its divisors is an integer number (25087570992).

Almost surely, 2^221311231010 is an apocalyptic number.

221311231010 is a deficient number, since it is larger than the sum of its proper divisors (180089904862).

221311231010 is a wasteful number, since it uses less digits than its factorization.

221311231010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168940009.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 221311231010 its reverse (10132113122), we get a palindrome (231443344132).

The spelling of 221311231010 in words is "two hundred twenty-one billion, three hundred eleven million, two hundred thirty-one thousand, ten".