1205102413123 has 16 divisors (see below), whose sum is σ = 1388621617344. Its totient is φ = 1024437864960.

The previous prime is 1205102413061. The next prime is 1205102413147. The reversal of 1205102413123 is 3213142015021.

It is a cyclic number.

It is not a de Polignac number, because 1205102413123 - 2¹³ = 1205102404931 is a prime.

It is a super-2 number, since 2×1205102413123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1205102413223) 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, 425311 + ... + 1609687.

It is an arithmetic number, because the mean of its divisors is an integer number (86788851084).

Almost surely, 2^{1205102413123} is an apocalyptic number.

1205102413123 is a deficient number, since it is larger than the sum of its proper divisors (183519204221).

1205102413123 is a wasteful number, since it uses less digits than its factorization.

1205102413123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185582.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 1205102413123 its reverse (3213142015021), we get a palindrome (4418244428144).

The spelling of 1205102413123 in words is "one trillion, two hundred five billion, one hundred two million, four hundred thirteen thousand, one hundred twenty-three".