308120101 has 4 divisors (see below), whose sum is σ = 309822604. Its totient is φ = 306417600.

The previous prime is 308120083. The next prime is 308120123. The reversal of 308120101 is 101021803.

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 144024001 + 164096100 = 12001^2 + 12810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-308120101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308100101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 850980 + ... + 851341.

It is an arithmetic number, because the mean of its divisors is an integer number (77455651).

Almost surely, 2^308120101 is an apocalyptic number.

It is an amenable number.

308120101 is a deficient number, since it is larger than the sum of its proper divisors (1702503).

308120101 is a wasteful number, since it uses less digits than its factorization.

308120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702502.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 308120101 is about 17553.3501360851. The cubic root of 308120101 is about 675.4191094501.

Adding to 308120101 its reverse (101021803), we get a palindrome (409141904).

It can be divided in two parts, 308 and 120101, that added together give a square (120409 = 347²).

The spelling of 308120101 in words is "three hundred eight million, one hundred twenty thousand, one hundred one".