122166038591 has 8 divisors (see below), whose sum is σ = 123688146960. Its totient is φ = 120647251648.

The previous prime is 122166038581. The next prime is 122166038597. The reversal of 122166038591 is 195830661221.

It is a happy number.

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-122166038591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122166038597) 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, 756296 + ... + 903501.

It is an arithmetic number, because the mean of its divisors is an integer number (15461018370).

Almost surely, 2^122166038591 is an apocalyptic number.

122166038591 is a deficient number, since it is larger than the sum of its proper divisors (1522108369).

122166038591 is an equidigital number, since it uses as much as digits as its factorization.

122166038591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660713.

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 122166038591 in words is "one hundred twenty-two billion, one hundred sixty-six million, thirty-eight thousand, five hundred ninety-one".