13121340212 has 12 divisors (see below), whose sum is σ = 23173009860. Its totient is φ = 6500480256.

The previous prime is 13121340191. The next prime is 13121340257. The reversal of 13121340212 is 21204312131.

It can be written as a sum of positive squares in 2 ways, for example, as 11566142116 + 1555198096 = 107546^2 + 39436^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15046973 + ... + 15047844.

It is an arithmetic number, because the mean of its divisors is an integer number (1931084155).

Almost surely, 2^13121340212 is an apocalyptic number.

It is an amenable number.

13121340212 is a deficient number, since it is larger than the sum of its proper divisors (10051669648).

13121340212 is a wasteful number, since it uses less digits than its factorization.

13121340212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30094930 (or 30094928 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 13121340212 its reverse (21204312131), we get a palindrome (34325652343).

The spelling of 13121340212 in words is "thirteen billion, one hundred twenty-one million, three hundred forty thousand, two hundred twelve".