1306120561101 has 12 divisors (see below), whose sum is σ = 1886632618780. Its totient is φ = 870740565120.

The previous prime is 1306120561079. The next prime is 1306120561121. The reversal of 1306120561101 is 1011650216031.

1306120561101 is a `hidden beast` number, since 1 + 30 + 6 + 12 + 0 + 5 + 611 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 946271745225 + 359848815876 = 972765^2 + 599874^2 .

It is not a de Polignac number, because 1306120561101 - 2¹¹ = 1306120559053 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306120561121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 955941 + ... + 1877781.

Almost surely, 2^{1306120561101} is an apocalyptic number.

It is an amenable number.

1306120561101 is a deficient number, since it is larger than the sum of its proper divisors (580512057679).

1306120561101 is a wasteful number, since it uses less digits than its factorization.

1306120561101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079276 (or 1079273 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

Adding to 1306120561101 its reverse (1011650216031), we get a palindrome (2317770777132).

The spelling of 1306120561101 in words is "one trillion, three hundred six billion, one hundred twenty million, five hundred sixty-one thousand, one hundred one".