616212101 has 2 divisors, whose sum is σ = 616212102. Its totient is φ = 616212100.

The previous prime is 616212049. The next prime is 616212119. The reversal of 616212101 is 101212616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 386083201 + 230128900 = 19649^2 + 15170^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616212101 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616214101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308106050 + 308106051.

It is an arithmetic number, because the mean of its divisors is an integer number (308106051).

Almost surely, 2^616212101 is an apocalyptic number.

It is an amenable number.

616212101 is a deficient number, since it is larger than the sum of its proper divisors (1).

616212101 is an equidigital number, since it uses as much as digits as its factorization.

616212101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 616212101 is about 24823.6198206466. The cubic root of 616212101 is about 850.9618182789.

Adding to 616212101 its reverse (101212616), we get a palindrome (717424717).

The spelling of 616212101 in words is "six hundred sixteen million, two hundred twelve thousand, one hundred one".