13121021202101 has 16 divisors (see below), whose sum is σ = 13738194993600. Its totient is φ = 12515559452928.

The previous prime is 13121021202059. The next prime is 13121021202103. The reversal of 13121021202101 is 10120212012131.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13121021202101 - 2³⁸ = 12846143295157 is a prime.

It is a super-2 number, since 2×13121021202101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13121021202101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121021202103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5515091 + ... + 7527168.

It is an arithmetic number, because the mean of its divisors is an integer number (858637187100).

Almost surely, 2^{13121021202101} is an apocalyptic number.

It is an amenable number.

13121021202101 is a deficient number, since it is larger than the sum of its proper divisors (617173791499).

13121021202101 is a wasteful number, since it uses less digits than its factorization.

13121021202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13042708.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 13121021202101 its reverse (10120212012131), we get a palindrome (23241233214232).

The spelling of 13121021202101 in words is "thirteen trillion, one hundred twenty-one billion, twenty-one million, two hundred two thousand, one hundred one".