3101112221 has 4 divisors (see below), whose sum is σ = 3102012732. Its totient is φ = 3100211712.

The previous prime is 3101112211. The next prime is 3101112253. The reversal of 3101112221 is 1222111013.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61795321 + 3039316900 = 7861^2 + 55130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3101112221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3101112196 and 3101112205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3101112211) 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, 445070 + ... + 451983.

It is an arithmetic number, because the mean of its divisors is an integer number (775503183).

Almost surely, 2^3101112221 is an apocalyptic number.

It is an amenable number.

3101112221 is a deficient number, since it is larger than the sum of its proper divisors (900511).

3101112221 is an equidigital number, since it uses as much as digits as its factorization.

3101112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900510.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 3101112221 is about 55687.6307720126. The cubic root of 3101112221 is about 1458.2740944543.

Adding to 3101112221 its reverse (1222111013), we get a palindrome (4323223234).

The spelling of 3101112221 in words is "three billion, one hundred one million, one hundred twelve thousand, two hundred twenty-one".