1305122101 has 4 divisors (see below), whose sum is σ = 1318044204. Its totient is φ = 1292200000.

The previous prime is 1305122087. The next prime is 1305122131. The reversal of 1305122101 is 1012215031.

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 1251319876 + 53802225 = 35374^2 + 7335^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305122101 - 2⁵ = 1305122069 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 (1305122131) 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, 6460900 + ... + 6461101.

It is an arithmetic number, because the mean of its divisors is an integer number (329511051).

Almost surely, 2^1305122101 is an apocalyptic number.

It is an amenable number.

1305122101 is a deficient number, since it is larger than the sum of its proper divisors (12922103).

1305122101 is a wasteful number, since it uses less digits than its factorization.

1305122101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12922102.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1305122101 is about 36126.4736862041. The cubic root of 1305122101 is about 1092.8243955313.

Adding to 1305122101 its reverse (1012215031), we get a palindrome (2317337132).

The spelling of 1305122101 in words is "one billion, three hundred five million, one hundred twenty-two thousand, one hundred one".