3100212221 has 2 divisors, whose sum is σ = 3100212222. Its totient is φ = 3100212220.

The previous prime is 3100212187. The next prime is 3100212233. The reversal of 3100212221 is 1222120013.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2838225625 + 261986596 = 53275^2 + 16186^2 .

It is an emirp because it is prime and its reverse (1222120013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3100212221 - 2¹⁰ = 3100211197 is a prime.

It is a super-2 number, since 2×3100212221² = 19222631630475505682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3100212196 and 3100212205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3100242221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1550106110 + 1550106111.

It is an arithmetic number, because the mean of its divisors is an integer number (1550106111).

Almost surely, 2^3100212221 is an apocalyptic number.

It is an amenable number.

3100212221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3100212221 is an equidigital number, since it uses as much as digits as its factorization.

3100212221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 3100212221 is about 55679.5493965244. The cubic root of 3100212221 is about 1458.1330081195.

Adding to 3100212221 its reverse (1222120013), we get a palindrome (4322332234).

The spelling of 3100212221 in words is "three billion, one hundred million, two hundred twelve thousand, two hundred twenty-one".