1123526730121 has 2 divisors, whose sum is σ = 1123526730122. Its totient is φ = 1123526730120.

The previous prime is 1123526730119. The next prime is 1123526730149. The reversal of 1123526730121 is 1210376253211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 978247596096 + 145279134025 = 989064^2 + 381155^2 .

It is an emirp because it is prime and its reverse (1210376253211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1123526730121 - 2¹ = 1123526730119 is a prime.

Together with 1123526730119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1123529730121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561763365060 + 561763365061.

It is an arithmetic number, because the mean of its divisors is an integer number (561763365061).

Almost surely, 2^{1123526730121} is an apocalyptic number.

It is an amenable number.

1123526730121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123526730121 is an equidigital number, since it uses as much as digits as its factorization.

1123526730121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The spelling of 1123526730121 in words is "one trillion, one hundred twenty-three billion, five hundred twenty-six million, seven hundred thirty thousand, one hundred twenty-one".