221313031101 has 12 divisors (see below), whose sum is σ = 328314226812. Its totient is φ = 143554398336.

The previous prime is 221313031033. The next prime is 221313031103. The reversal of 221313031101 is 101130313122.

221313031101 is a `hidden beast` number, since 221 + 3 + 130 + 311 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 110922968601 + 110390062500 = 333051^2 + 332250^2 .

It is a de Polignac number, because none of the positive numbers 2^k-221313031101 is a prime.

It is a super-2 number, since 2×221313031101² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221313031103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 332301516 + ... + 332302181.

It is an arithmetic number, because the mean of its divisors is an integer number (27359518901).

Almost surely, 2^221313031101 is an apocalyptic number.

It is an amenable number.

221313031101 is a deficient number, since it is larger than the sum of its proper divisors (107001195711).

221313031101 is a wasteful number, since it uses less digits than its factorization.

221313031101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664603740 (or 664603737 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 221313031101 its reverse (101130313122), we get a palindrome (322443344223).

The spelling of 221313031101 in words is "two hundred twenty-one billion, three hundred thirteen million, thirty-one thousand, one hundred one".