126523031123 has 2 divisors, whose sum is σ = 126523031124. Its totient is φ = 126523031122.

The previous prime is 126523031113. The next prime is 126523031183. The reversal of 126523031123 is 321130325621.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126523031123 - 2²⁶ = 126455922259 is a prime.

It is a super-2 number, since 2×126523031123² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126523031113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63261515561 + 63261515562.

It is an arithmetic number, because the mean of its divisors is an integer number (63261515562).

Almost surely, 2^126523031123 is an apocalyptic number.

126523031123 is a deficient number, since it is larger than the sum of its proper divisors (1).

126523031123 is an equidigital number, since it uses as much as digits as its factorization.

126523031123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

Adding to 126523031123 its reverse (321130325621), we get a palindrome (447653356744).

The spelling of 126523031123 in words is "one hundred twenty-six billion, five hundred twenty-three million, thirty-one thousand, one hundred twenty-three".