13121121330202 has 4 divisors (see below), whose sum is σ = 19681681995306. Its totient is φ = 6560560665100.

The previous prime is 13121121330137. The next prime is 13121121330203. The reversal of 13121121330202 is 20203312112131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12123342095881 + 997779234321 = 3481859^2 + 998889^2 .

It is not an unprimeable number, because it can be changed into a prime (13121121330203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3280280332549 + ... + 3280280332552.

Almost surely, 2^{13121121330202} is an apocalyptic number.

13121121330202 is a deficient number, since it is larger than the sum of its proper divisors (6560560665104).

13121121330202 is an equidigital number, since it uses as much as digits as its factorization.

13121121330202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6560560665103.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 13121121330202 its reverse (20203312112131), we get a palindrome (33324433442333).

The spelling of 13121121330202 in words is "thirteen trillion, one hundred twenty-one billion, one hundred twenty-one million, three hundred thirty thousand, two hundred two".