12205405145542 has 16 divisors (see below), whose sum is σ = 20924456332032. Its totient is φ = 5230661756040.

The previous prime is 12205405145477. The next prime is 12205405145627. The reversal of 12205405145542 is 24554150450221.

12205405145542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12205405145495 and 12205405145504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18511384 + ... + 19159387.

It is an arithmetic number, because the mean of its divisors is an integer number (1307778520752).

Almost surely, 2^{12205405145542} is an apocalyptic number.

12205405145542 is a deficient number, since it is larger than the sum of its proper divisors (8719051186490).

12205405145542 is a wasteful number, since it uses less digits than its factorization.

12205405145542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37693923.

The product of its (nonzero) digits is 320000, while the sum is 40.

Adding to 12205405145542 its reverse (24554150450221), we get a palindrome (36759555595763).

The spelling of 12205405145542 in words is "twelve trillion, two hundred five billion, four hundred five million, one hundred forty-five thousand, five hundred forty-two".