121021310112013 has 2 divisors, whose sum is σ = 121021310112014. Its totient is φ = 121021310112012.

The previous prime is 121021310112011. The next prime is 121021310112029. The reversal of 121021310112013 is 310211013120121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67674018922084 + 53347291189929 = 8226422^2 + 7303923^2 .

It is a cyclic number.

It is not a de Polignac number, because 121021310112013 - 2¹ = 121021310112011 is a prime.

Together with 121021310112011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121021310112011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510655056006 + 60510655056007.

It is an arithmetic number, because the mean of its divisors is an integer number (60510655056007).

Almost surely, 2^{121021310112013} is an apocalyptic number.

It is an amenable number.

121021310112013 is a deficient number, since it is larger than the sum of its proper divisors (1).

121021310112013 is an equidigital number, since it uses as much as digits as its factorization.

121021310112013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 121021310112013 its reverse (310211013120121), we get a palindrome (431232323232134).

The spelling of 121021310112013 in words is "one hundred twenty-one trillion, twenty-one billion, three hundred ten million, one hundred twelve thousand, thirteen".