121717607225 has 12 divisors (see below), whose sum is σ = 150949324860. Its totient is φ = 97361510400.

The previous prime is 121717607213. The next prime is 121717607239. The reversal of 121717607225 is 522706717121.

It can be written as a sum of positive squares in 6 ways, for example, as 9838060969 + 111879546256 = 99187^2 + 334484^2 .

It is not a de Polignac number, because 121717607225 - 2¹⁰ = 121717606201 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114440 + ... + 506489.

It is an arithmetic number, because the mean of its divisors is an integer number (12579110405).

Almost surely, 2^121717607225 is an apocalyptic number.

It is an amenable number.

121717607225 is a deficient number, since it is larger than the sum of its proper divisors (29231717635).

121717607225 is an equidigital number, since it uses as much as digits as its factorization.

121717607225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628780 (or 628775 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 41.

The spelling of 121717607225 in words is "one hundred twenty-one billion, seven hundred seventeen million, six hundred seven thousand, two hundred twenty-five".