1211142134123 has 4 divisors (see below), whose sum is σ = 1211402543448. Its totient is φ = 1210881724800.

The previous prime is 1211142134089. The next prime is 1211142134171. The reversal of 1211142134123 is 3214312411121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1211142134123 - 2¹⁴ = 1211142117739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211142134092 and 1211142134101.

It is not an unprimeable number, because it can be changed into a prime (1211142134183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130197686 + ... + 130206987.

It is an arithmetic number, because the mean of its divisors is an integer number (302850635862).

Almost surely, 2^{1211142134123} is an apocalyptic number.

1211142134123 is a deficient number, since it is larger than the sum of its proper divisors (260409325).

1211142134123 is an equidigital number, since it uses as much as digits as its factorization.

1211142134123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260409324.

The product of its digits is 1152, while the sum is 26.

Adding to 1211142134123 its reverse (3214312411121), we get a palindrome (4425454545244).

The spelling of 1211142134123 in words is "one trillion, two hundred eleven billion, one hundred forty-two million, one hundred thirty-four thousand, one hundred twenty-three".