121315713 has 4 divisors (see below), whose sum is σ = 161754288. Its totient is φ = 80877140.

The previous prime is 121315709. The next prime is 121315717. The reversal of 121315713 is 317513121.

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 an interprime number because it is at equal distance from previous prime (121315709) and next prime (121315717).

It is a cyclic number.

It is not a de Polignac number, because 121315713 - 2² = 121315709 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121315717) 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, 20219283 + ... + 20219288.

It is an arithmetic number, because the mean of its divisors is an integer number (40438572).

Almost surely, 2^121315713 is an apocalyptic number.

It is an amenable number.

121315713 is a deficient number, since it is larger than the sum of its proper divisors (40438575).

121315713 is an equidigital number, since it uses as much as digits as its factorization.

121315713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40438574.

The product of its digits is 630, while the sum is 24.

The square root of 121315713 is about 11014.3412422169. The cubic root of 121315713 is about 495.0385481662.

Adding to 121315713 its reverse (317513121), we get a palindrome (438828834).

The spelling of 121315713 in words is "one hundred twenty-one million, three hundred fifteen thousand, seven hundred thirteen".