122217912 has 24 divisors (see below), whose sum is σ = 331007040. Its totient is φ = 40739280.

The previous prime is 122217877. The next prime is 122217917. The reversal of 122217912 is 219712221.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 848664 + ... + 848807.

It is an arithmetic number, because the mean of its divisors is an integer number (13791960).

Almost surely, 2^122217912 is an apocalyptic number.

122217912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

122217912 is an abundant number, since it is smaller than the sum of its proper divisors (208789128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122217912 is a wasteful number, since it uses less digits than its factorization.

122217912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1697483 (or 1697476 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 122217912 is about 11055.2210289980. The cubic root of 122217912 is about 496.2626838711.

The spelling of 122217912 in words is "one hundred twenty-two million, two hundred seventeen thousand, nine hundred twelve".