122543513311 has 4 divisors (see below), whose sum is σ = 122547635272. Its totient is φ = 122539391352.

The previous prime is 122543513299. The next prime is 122543513347. The reversal of 122543513311 is 113315345221.

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 122543513311 - 2²¹ = 122541416159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122543514311) 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, 2016060 + ... + 2075953.

It is an arithmetic number, because the mean of its divisors is an integer number (30636908818).

Almost surely, 2^122543513311 is an apocalyptic number.

122543513311 is a deficient number, since it is larger than the sum of its proper divisors (4121961).

122543513311 is an equidigital number, since it uses as much as digits as its factorization.

122543513311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4121960.

The product of its digits is 10800, while the sum is 31.

Adding to 122543513311 its reverse (113315345221), we get a palindrome (235858858532).

The spelling of 122543513311 in words is "one hundred twenty-two billion, five hundred forty-three million, five hundred thirteen thousand, three hundred eleven".