13121125421212 has 12 divisors (see below), whose sum is σ = 22977046299816. Its totient is φ = 6556255049840.

The previous prime is 13121125421197. The next prime is 13121125421219. The reversal of 13121125421212 is 21212452112131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121125421219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1076908339 + ... + 1076920522.

It is an arithmetic number, because the mean of its divisors is an integer number (1914753858318).

Almost surely, 2^{13121125421212} is an apocalyptic number.

It is an amenable number.

13121125421212 is a deficient number, since it is larger than the sum of its proper divisors (9855920878604).

13121125421212 is a wasteful number, since it uses less digits than its factorization.

13121125421212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2153830388 (or 2153830386 counting only the distinct ones).

The product of its digits is 1920, while the sum is 28.

Adding to 13121125421212 its reverse (21212452112131), we get a palindrome (34333577533343).

The spelling of 13121125421212 in words is "thirteen trillion, one hundred twenty-one billion, one hundred twenty-five million, four hundred twenty-one thousand, two hundred twelve".