135021104123 has 2 divisors, whose sum is σ = 135021104124. Its totient is φ = 135021104122.

The previous prime is 135021104017. The next prime is 135021104137. The reversal of 135021104123 is 321401120531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135021104123 - 2¹⁸ = 135020841979 is a prime.

It is not a weakly prime, because it can be changed into another prime (135021106123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67510552061 + 67510552062.

It is an arithmetic number, because the mean of its divisors is an integer number (67510552062).

Almost surely, 2^135021104123 is an apocalyptic number.

135021104123 is a deficient number, since it is larger than the sum of its proper divisors (1).

135021104123 is an equidigital number, since it uses as much as digits as its factorization.

135021104123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 135021104123 its reverse (321401120531), we get a palindrome (456422224654).

The spelling of 135021104123 in words is "one hundred thirty-five billion, twenty-one million, one hundred four thousand, one hundred twenty-three".