13121421126 has 32 divisors (see below), whose sum is σ = 28636675200. Its totient is φ = 3975060480.

The previous prime is 13121421077. The next prime is 13121421127. The reversal of 13121421126 is 62112412131.

It is a junction number, because it is equal to n+sod(n) for n = 13121421096 and 13121421105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121421127) 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, 223110 + ... + 275718.

It is an arithmetic number, because the mean of its divisors is an integer number (894896100).

Almost surely, 2^13121421126 is an apocalyptic number.

13121421126 is an abundant number, since it is smaller than the sum of its proper divisors (15515254074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13121421126 is a wasteful number, since it uses less digits than its factorization.

13121421126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56404.

The product of its digits is 576, while the sum is 24.

Adding to 13121421126 its reverse (62112412131), we get a palindrome (75233833257).

The spelling of 13121421126 in words is "thirteen billion, one hundred twenty-one million, four hundred twenty-one thousand, one hundred twenty-six".