221312301101 has 6 divisors (see below), whose sum is σ = 235096458570. Its totient is φ = 208293930176.

The previous prime is 221312301083. The next prime is 221312301113. The reversal of 221312301101 is 101103213122.

It can be written as a sum of positive squares in 3 ways, for example, as 169640191876 + 51672109225 = 411874^2 + 227315^2 .

It is not a de Polignac number, because 221312301101 - 2⁶ = 221312301037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221312301101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221312301151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 382892966 + ... + 382893543.

It is an arithmetic number, because the mean of its divisors is an integer number (39182743095).

Almost surely, 2^221312301101 is an apocalyptic number.

It is an amenable number.

221312301101 is a deficient number, since it is larger than the sum of its proper divisors (13784157469).

221312301101 is an equidigital number, since it uses as much as digits as its factorization.

221312301101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765786543 (or 765786526 counting only the distinct ones).

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

Adding to 221312301101 its reverse (101103213122), we get a palindrome (322415514223).

It can be divided in two parts, 22131 and 2301101, that added together give a palindrome (2323232).

The spelling of 221312301101 in words is "two hundred twenty-one billion, three hundred twelve million, three hundred one thousand, one hundred one".