13040021123 has 2 divisors, whose sum is σ = 13040021124. Its totient is φ = 13040021122.

The previous prime is 13040021107. The next prime is 13040021147. The reversal of 13040021123 is 32112004031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13040021123 - 2⁴ = 13040021107 is a prime.

It is a super-2 number, since 2×13040021123² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13040021023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6520010561 + 6520010562.

It is an arithmetic number, because the mean of its divisors is an integer number (6520010562).

Almost surely, 2^13040021123 is an apocalyptic number.

13040021123 is a deficient number, since it is larger than the sum of its proper divisors (1).

13040021123 is an equidigital number, since it uses as much as digits as its factorization.

13040021123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 13040021123 its reverse (32112004031), we get a palindrome (45152025154).

The spelling of 13040021123 in words is "thirteen billion, forty million, twenty-one thousand, one hundred twenty-three".