12205101521123 has 16 divisors (see below), whose sum is σ = 14325862797504. Its totient is φ = 10178641336320.

The previous prime is 12205101521071. The next prime is 12205101521147. The reversal of 12205101521123 is 32112510150221.

It is a cyclic number.

It is not a de Polignac number, because 12205101521123 - 2⁴⁰ = 11105589893347 is a prime.

It is a super-2 number, since 2×12205101521123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12205101521092 and 12205101521101.

It is not an unprimeable number, because it can be changed into a prime (12205101571123) 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, 23551211 + ... + 24063867.

It is an arithmetic number, because the mean of its divisors is an integer number (895366424844).

Almost surely, 2^{12205101521123} is an apocalyptic number.

12205101521123 is a deficient number, since it is larger than the sum of its proper divisors (2120761276381).

12205101521123 is an equidigital number, since it uses as much as digits as its factorization.

12205101521123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604622.

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 12205101521123 its reverse (32112510150221), we get a palindrome (44317611671344).

The spelling of 12205101521123 in words is "twelve trillion, two hundred five billion, one hundred one million, five hundred twenty-one thousand, one hundred twenty-three".