121131201320213 has 4 divisors (see below), whose sum is σ = 138435658651680. Its totient is φ = 103826743988748.

The previous prime is 121131201320209. The next prime is 121131201320219. The reversal of 121131201320213 is 312023102131121.

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 121131201320213 - 2² = 121131201320209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121131201320219) 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, 8652228665723 + ... + 8652228665736.

It is an arithmetic number, because the mean of its divisors is an integer number (34608914662920).

Almost surely, 2^{121131201320213} is an apocalyptic number.

It is an amenable number.

121131201320213 is a deficient number, since it is larger than the sum of its proper divisors (17304457331467).

121131201320213 is an equidigital number, since it uses as much as digits as its factorization.

121131201320213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17304457331466.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 121131201320213 its reverse (312023102131121), we get a palindrome (433154303451334).

The spelling of 121131201320213 in words is "one hundred twenty-one trillion, one hundred thirty-one billion, two hundred one million, three hundred twenty thousand, two hundred thirteen".