13124204021111 has 4 divisors (see below), whose sum is σ = 13135488806472. Its totient is φ = 13112919235752.

The previous prime is 13124204021011. The next prime is 13124204021213. The reversal of 13124204021111 is 11112040242131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13124204021111 is a prime.

It is a super-2 number, since 2×13124204021111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13124204021011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5642390936 + ... + 5642393261.

It is an arithmetic number, because the mean of its divisors is an integer number (3283872201618).

Almost surely, 2^{13124204021111} is an apocalyptic number.

13124204021111 is a deficient number, since it is larger than the sum of its proper divisors (11284785361).

13124204021111 is a wasteful number, since it uses less digits than its factorization.

13124204021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11284785360.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 13124204021111 its reverse (11112040242131), we get a palindrome (24236244263242).

The spelling of 13124204021111 in words is "thirteen trillion, one hundred twenty-four billion, two hundred four million, twenty-one thousand, one hundred eleven".