121315310497 has 4 divisors (see below), whose sum is σ = 121316183856. Its totient is φ = 121314437140.

The previous prime is 121315310453. The next prime is 121315310507. The reversal of 121315310497 is 794013513121.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121315310497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121315310297) 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, 176743 + ... + 523324.

It is an arithmetic number, because the mean of its divisors is an integer number (30329045964).

Almost surely, 2^121315310497 is an apocalyptic number.

It is an amenable number.

121315310497 is a deficient number, since it is larger than the sum of its proper divisors (873359).

121315310497 is an equidigital number, since it uses as much as digits as its factorization.

121315310497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873358.

The product of its (nonzero) digits is 22680, while the sum is 37.

The spelling of 121315310497 in words is "one hundred twenty-one billion, three hundred fifteen million, three hundred ten thousand, four hundred ninety-seven".