1205105101 has 4 divisors (see below), whose sum is σ = 1205252604. Its totient is φ = 1204957600.

The previous prime is 1205105089. The next prime is 1205105113. The reversal of 1205105101 is 1015015021.

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

It is an interprime number because it is at equal distance from previous prime (1205105089) and next prime (1205105113).

It can be written as a sum of positive squares in 2 ways, for example, as 551075625 + 654029476 = 23475^2 + 25574^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205105101 - 2¹³ = 1205096909 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 (1205108101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60730 + ... + 78091.

It is an arithmetic number, because the mean of its divisors is an integer number (301313151).

Almost surely, 2^1205105101 is an apocalyptic number.

It is an amenable number.

1205105101 is a deficient number, since it is larger than the sum of its proper divisors (147503).

1205105101 is an equidigital number, since it uses as much as digits as its factorization.

1205105101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147502.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 1205105101 is about 34714.6237340980. The cubic root of 1205105101 is about 1064.1633759551.

The spelling of 1205105101 in words is "one billion, two hundred five million, one hundred five thousand, one hundred one".