13120343133021 has 6 divisors (see below), whose sum is σ = 18951606747710. Its totient is φ = 8746895422008.

The previous prime is 13120343132993. The next prime is 13120343133071. The reversal of 13120343133021 is 12033134302131.

13120343133021 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 0 + 343 + 13 + 302 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12904224140025 + 216118992996 = 3592245^2 + 464886^2 .

It is not a de Polignac number, because 13120343133021 - 2⁶ = 13120343132957 is a prime.

It is a super-2 number, since 2×13120343133021² (a number of 27 digits) contains 22 as substring.

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 (13120343133071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 728907951826 + ... + 728907951843.

Almost surely, 2^{13120343133021} is an apocalyptic number.

It is an amenable number.

13120343133021 is a deficient number, since it is larger than the sum of its proper divisors (5831263614689).

13120343133021 is a wasteful number, since it uses less digits than its factorization.

13120343133021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457815903675 (or 1457815903672 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 13120343133021 its reverse (12033134302131), we get a palindrome (25153477435152).

The spelling of 13120343133021 in words is "thirteen trillion, one hundred twenty billion, three hundred forty-three million, one hundred thirty-three thousand, twenty-one".