122219820 has 96 divisors (see below), whose sum is σ = 382233600. Its totient is φ = 32421312.

The previous prime is 122219813. The next prime is 122219821. The reversal of 122219820 is 28912221.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (122219821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128587 + ... + 129533.

It is an arithmetic number, because the mean of its divisors is an integer number (3981600).

Almost surely, 2^122219820 is an apocalyptic number.

122219820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122219820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191116800).

122219820 is an abundant number, since it is smaller than the sum of its proper divisors (260013780).

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

122219820 is a wasteful number, since it uses less digits than its factorization.

122219820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204 (or 1196 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 122219820 is about 11055.3073227297. The cubic root of 122219820 is about 496.2652663193.

The spelling of 122219820 in words is "one hundred twenty-two million, two hundred nineteen thousand, eight hundred twenty".