611121111143 has 2 divisors, whose sum is σ = 611121111144. Its totient is φ = 611121111142.

The previous prime is 611121111137. The next prime is 611121111287. The reversal of 611121111143 is 341111121116.

It is a m-pointer prime, because the next prime (611121111287) can be obtained adding 611121111143 to its product of digits (144).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 611121111143 - 2²⁸ = 610852675687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611121111443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305560555571 + 305560555572.

It is an arithmetic number, because the mean of its divisors is an integer number (305560555572).

Almost surely, 2^611121111143 is an apocalyptic number.

611121111143 is a deficient number, since it is larger than the sum of its proper divisors (1).

611121111143 is an equidigital number, since it uses as much as digits as its factorization.

611121111143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 23.

Adding to 611121111143 its reverse (341111121116), we get a palindrome (952232232259).

The spelling of 611121111143 in words is "six hundred eleven billion, one hundred twenty-one million, one hundred eleven thousand, one hundred forty-three".