13121402212 has 24 divisors (see below), whose sum is σ = 23092123320. Its totient is φ = 6523756800.

The previous prime is 13121402201. The next prime is 13121402219. The reversal of 13121402212 is 21220412131.

It can be written as a sum of positive squares in 4 ways, for example, as 2341979236 + 10779422976 = 48394^2 + 103824^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13121402212.

It is not an unprimeable number, because it can be changed into a prime (13121402219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505962 + ... + 531262.

It is an arithmetic number, because the mean of its divisors is an integer number (962171805).

Almost surely, 2^13121402212 is an apocalyptic number.

It is an amenable number.

13121402212 is a deficient number, since it is larger than the sum of its proper divisors (9970721108).

13121402212 is a wasteful number, since it uses less digits than its factorization.

13121402212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26031 (or 26029 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 13121402212 its reverse (21220412131), we get a palindrome (34341814343).

The spelling of 13121402212 in words is "thirteen billion, one hundred twenty-one million, four hundred two thousand, two hundred twelve".