13101120121021 has 4 divisors (see below), whose sum is σ = 13107673960000. Its totient is φ = 13094566282044.

The previous prime is 13101120120931. The next prime is 13101120121051. The reversal of 13101120121021 is 12012102110131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13101120121021 - 2¹⁷ = 13101119989949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13101120120986 and 13101120121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13101120121051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3276916491 + ... + 3276920488.

It is an arithmetic number, because the mean of its divisors is an integer number (3276918490000).

Almost surely, 2^{13101120121021} is an apocalyptic number.

It is an amenable number.

13101120121021 is a deficient number, since it is larger than the sum of its proper divisors (6553838979).

13101120121021 is an equidigital number, since it uses as much as digits as its factorization.

13101120121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6553838978.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 13101120121021 its reverse (12012102110131), we get a palindrome (25113222231152).

The spelling of 13101120121021 in words is "thirteen trillion, one hundred one billion, one hundred twenty million, one hundred twenty-one thousand, twenty-one".