13121100111 has 16 divisors (see below), whose sum is σ = 20057140224. Its totient is φ = 7474115424.

The previous prime is 13121100107. The next prime is 13121100119. The reversal of 13121100111 is 11100112131.

It is not a de Polignac number, because 13121100111 - 2² = 13121100107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121100119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 978855 + ... + 992168.

It is an arithmetic number, because the mean of its divisors is an integer number (1253571264).

Almost surely, 2^13121100111 is an apocalyptic number.

13121100111 is a deficient number, since it is larger than the sum of its proper divisors (6936040113).

13121100111 is a wasteful number, since it uses less digits than its factorization.

13121100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1971350.

The product of its (nonzero) digits is 6, while the sum is 12.

Adding to 13121100111 its reverse (11100112131), we get a palindrome (24221212242).

The spelling of 13121100111 in words is "thirteen billion, one hundred twenty-one million, one hundred thousand, one hundred eleven".