121715165201 has 4 divisors (see below), whose sum is σ = 139103045952. Its totient is φ = 104327284452.

The previous prime is 121715165167. The next prime is 121715165239. The reversal of 121715165201 is 102561517121.

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 121715165201 - 2¹⁴ = 121715148817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121715165281) 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, 8693940365 + ... + 8693940378.

It is an arithmetic number, because the mean of its divisors is an integer number (34775761488).

Almost surely, 2^121715165201 is an apocalyptic number.

It is an amenable number.

121715165201 is a deficient number, since it is larger than the sum of its proper divisors (17387880751).

121715165201 is an equidigital number, since it uses as much as digits as its factorization.

121715165201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17387880750.

The product of its (nonzero) digits is 4200, while the sum is 32.

The spelling of 121715165201 in words is "one hundred twenty-one billion, seven hundred fifteen million, one hundred sixty-five thousand, two hundred one".