1211134420343 has 4 divisors (see below), whose sum is σ = 1211191735320. Its totient is φ = 1211077105368.

The previous prime is 1211134420319. The next prime is 1211134420357. The reversal of 1211134420343 is 3430244311121.

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 1211134420343 - 2⁸ = 1211134420087 is a prime.

It is a super-2 number, since 2×1211134420343² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211134420303) 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, 28625780 + ... + 28668057.

It is an arithmetic number, because the mean of its divisors is an integer number (302797933830).

Almost surely, 2^{1211134420343} is an apocalyptic number.

1211134420343 is a deficient number, since it is larger than the sum of its proper divisors (57314977).

1211134420343 is an equidigital number, since it uses as much as digits as its factorization.

1211134420343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57314976.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 1211134420343 its reverse (3430244311121), we get a palindrome (4641378731464).

The spelling of 1211134420343 in words is "one trillion, two hundred eleven billion, one hundred thirty-four million, four hundred twenty thousand, three hundred forty-three".