13121020202 has 4 divisors (see below), whose sum is σ = 19681530306. Its totient is φ = 6560510100.

The previous prime is 13121020183. The next prime is 13121020229. The reversal of 13121020202 is 20202012131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20202012131 = 7 ⋅2886001733.

It can be written as a sum of positive squares in only one way, i.e., 12396818281 + 724201921 = 111341^2 + 26911^2 .

It is a super-2 number, since 2×13121020202² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3280255049 + ... + 3280255052.

Almost surely, 2^13121020202 is an apocalyptic number.

13121020202 is a deficient number, since it is larger than the sum of its proper divisors (6560510104).

13121020202 is an equidigital number, since it uses as much as digits as its factorization.

13121020202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6560510103.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 13121020202 its reverse (20202012131), we get a palindrome (33323032333).

The spelling of 13121020202 in words is "thirteen billion, one hundred twenty-one million, twenty thousand, two hundred two".