122172013 has 4 divisors (see below), whose sum is σ = 129358620. Its totient is φ = 114985408.

The previous prime is 122172007. The next prime is 122172019. The reversal of 122172013 is 310271221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310271221 = 13 ⋅23867017.

It is an interprime number because it is at equal distance from previous prime (122172007) and next prime (122172019).

It can be written as a sum of positive squares in 2 ways, for example, as 57562569 + 64609444 = 7587^2 + 8038^2 .

It is a cyclic number.

It is not a de Polignac number, because 122172013 - 2²¹ = 120074861 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 (122172019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3593278 + ... + 3593311.

It is an arithmetic number, because the mean of its divisors is an integer number (32339655).

Almost surely, 2^122172013 is an apocalyptic number.

It is an amenable number.

122172013 is a deficient number, since it is larger than the sum of its proper divisors (7186607).

122172013 is an equidigital number, since it uses as much as digits as its factorization.

122172013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7186606.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 122172013 is about 11053.1449370756. The cubic root of 122172013 is about 496.2005521901.

The spelling of 122172013 in words is "one hundred twenty-two million, one hundred seventy-two thousand, thirteen".