122661657127259 has 4 divisors (see below), whose sum is σ = 123598005655080. Its totient is φ = 121725308599440.

The previous prime is 122661657127249. The next prime is 122661657127327. The reversal of 122661657127259 is 952721756166221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122661657127259 - 2¹² = 122661657123163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122661657127249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 468174263714 + ... + 468174263975.

It is an arithmetic number, because the mean of its divisors is an integer number (30899501413770).

Almost surely, 2^{122661657127259} is an apocalyptic number.

122661657127259 is a deficient number, since it is larger than the sum of its proper divisors (936348527821).

122661657127259 is an equidigital number, since it uses as much as digits as its factorization.

122661657127259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936348527820.

The product of its digits is 38102400, while the sum is 62.

The spelling of 122661657127259 in words is "one hundred twenty-two trillion, six hundred sixty-one billion, six hundred fifty-seven million, one hundred twenty-seven thousand, two hundred fifty-nine".