13121023212 has 72 divisors (see below), whose sum is σ = 36677943120. Its totient is φ = 3921592320.

The previous prime is 13121023207. The next prime is 13121023241. The reversal of 13121023212 is 21232012131.

13121023212 is a `hidden beast` number, since 131 + 210 + 2 + 321 + 2 = 666.

13121023212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13121023212² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 198037 + ... + 255852.

Almost surely, 2^13121023212 is an apocalyptic number.

13121023212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13121023212 is an abundant number, since it is smaller than the sum of its proper divisors (23556919908).

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

13121023212 is a wasteful number, since it uses less digits than its factorization.

13121023212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453983 (or 453978 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 13121023212 its reverse (21232012131), we get a palindrome (34353035343).

The spelling of 13121023212 in words is "thirteen billion, one hundred twenty-one million, twenty-three thousand, two hundred twelve".