122217977 has 16 divisors (see below), whose sum is σ = 146342400. Its totient is φ = 99852480.

The previous prime is 122217943. The next prime is 122217989. The reversal of 122217977 is 779712221.

It is not a de Polignac number, because 122217977 - 2¹⁰ = 122216953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122217977.

It is not an unprimeable number, because it can be changed into a prime (122217917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12227 + ... + 19847.

It is an arithmetic number, because the mean of its divisors is an integer number (9146400).

Almost surely, 2^122217977 is an apocalyptic number.

It is an amenable number.

122217977 is a deficient number, since it is larger than the sum of its proper divisors (24124423).

122217977 is an equidigital number, since it uses as much as digits as its factorization.

122217977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7736.

The product of its digits is 24696, while the sum is 38.

The square root of 122217977 is about 11055.2239687851. The cubic root of 122217977 is about 496.2627718480.

The spelling of 122217977 in words is "one hundred twenty-two million, two hundred seventeen thousand, nine hundred seventy-seven".