2011523123 has 2 divisors, whose sum is σ = 2011523124. Its totient is φ = 2011523122.

The previous prime is 2011523119. The next prime is 2011523149. The reversal of 2011523123 is 3213251102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2011523123 - 2² = 2011523119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011523095 and 2011523104.

It is not a weakly prime, because it can be changed into another prime (2011525123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005761561 + 1005761562.

It is an arithmetic number, because the mean of its divisors is an integer number (1005761562).

Almost surely, 2^2011523123 is an apocalyptic number.

2011523123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011523123 is an equidigital number, since it uses as much as digits as its factorization.

2011523123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 2011523123 is about 44850.0069453729. The cubic root of 2011523123 is about 1262.3361218259.

Adding to 2011523123 its reverse (3213251102), we get a palindrome (5224774225).

The spelling of 2011523123 in words is "two billion, eleven million, five hundred twenty-three thousand, one hundred twenty-three".