13123335542 has 4 divisors (see below), whose sum is σ = 19685003316. Its totient is φ = 6561667770.

The previous prime is 13123335541. The next prime is 13123335551. The reversal of 13123335542 is 24553332131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24553332131 = 311 ⋅78949621.

It is a junction number, because it is equal to n+sod(n) for n = 13123335499 and 13123335508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123335541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3280833884 + ... + 3280833887.

It is an arithmetic number, because the mean of its divisors is an integer number (4921250829).

Almost surely, 2^13123335542 is an apocalyptic number.

13123335542 is a deficient number, since it is larger than the sum of its proper divisors (6561667774).

13123335542 is an equidigital number, since it uses as much as digits as its factorization.

13123335542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6561667773.

The product of its digits is 32400, while the sum is 32.

Adding to 13123335542 its reverse (24553332131), we get a palindrome (37676667673).

The spelling of 13123335542 in words is "thirteen billion, one hundred twenty-three million, three hundred thirty-five thousand, five hundred forty-two".