121761657313 has 8 divisors (see below), whose sum is σ = 122357289600. Its totient is φ = 121167334080.

The previous prime is 121761657299. The next prime is 121761657317. The reversal of 121761657313 is 313756167121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121761657313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121761657313.

It is not an unprimeable number, because it can be changed into a prime (121761657317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140520 + ... + 513097.

It is an arithmetic number, because the mean of its divisors is an integer number (15294661200).

Almost surely, 2^121761657313 is an apocalyptic number.

It is an amenable number.

121761657313 is a deficient number, since it is larger than the sum of its proper divisors (595632287).

121761657313 is an equidigital number, since it uses as much as digits as its factorization.

121761657313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654527.

The product of its digits is 158760, while the sum is 43.

The spelling of 121761657313 in words is "one hundred twenty-one billion, seven hundred sixty-one million, six hundred fifty-seven thousand, three hundred thirteen".