1365135138123 has 16 divisors (see below), whose sum is σ = 1851561763200. Its totient is φ = 894408153920.

The previous prime is 1365135138119. The next prime is 1365135138131. The reversal of 1365135138123 is 3218315315631.

It is a cyclic number.

It is not a de Polignac number, because 1365135138123 - 2² = 1365135138119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1365135138113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 486738 + ... + 1722551.

It is an arithmetic number, because the mean of its divisors is an integer number (115722610200).

Almost surely, 2^{1365135138123} is an apocalyptic number.

1365135138123 is a deficient number, since it is larger than the sum of its proper divisors (486426625077).

1365135138123 is a wasteful number, since it uses less digits than its factorization.

1365135138123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2212842.

The product of its digits is 194400, while the sum is 42.

The spelling of 1365135138123 in words is "one trillion, three hundred sixty-five billion, one hundred thirty-five million, one hundred thirty-eight thousand, one hundred twenty-three".