122066561 has 4 divisors (see below), whose sum is σ = 126004224. Its totient is φ = 118128900.

The previous prime is 122066533. The next prime is 122066573. The reversal of 122066561 is 165660221.

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 122066561 - 2¹⁴ = 122050177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122066591) 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, 1968785 + ... + 1968846.

It is an arithmetic number, because the mean of its divisors is an integer number (31501056).

Almost surely, 2^122066561 is an apocalyptic number.

It is an amenable number.

122066561 is a deficient number, since it is larger than the sum of its proper divisors (3937663).

122066561 is an equidigital number, since it uses as much as digits as its factorization.

122066561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3937662.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 122066561 is about 11048.3736812257. The cubic root of 122066561 is about 496.0577469728.

The spelling of 122066561 in words is "one hundred twenty-two million, sixty-six thousand, five hundred sixty-one".