122220000 has 360 divisors, whose sum is σ = 501476976. Its totient is φ = 27648000.

The previous prime is 122219983. The next prime is 122220019. The reversal of 122220000 is 22221.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1259952 + ... + 1260048.

Almost surely, 2^122220000 is an apocalyptic number.

122220000 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 122220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250738488).

122220000 is an abundant number, since it is smaller than the sum of its proper divisors (379256976).

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

122220000 is an equidigital number, since it uses as much as digits as its factorization.

122220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 122220000 is about 11055.3154636130. The cubic root of 122220000 is about 496.2655099451.

Adding to 122220000 its reverse (22221), we get a palindrome (122242221).

The spelling of 122220000 in words is "one hundred twenty-two million, two hundred twenty thousand".