122209541220 has 144 divisors (see below), whose sum is σ = 372757472640. Its totient is φ = 29901800448.

The previous prime is 122209541131. The next prime is 122209541227. The reversal of 122209541220 is 22145902221.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (122209541227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1657296 + ... + 1729464.

It is an arithmetic number, because the mean of its divisors is an integer number (2588593560).

Almost surely, 2^122209541220 is an apocalyptic number.

122209541220 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 122209541220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186378736320).

122209541220 is an abundant number, since it is smaller than the sum of its proper divisors (250547931420).

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

122209541220 is a wasteful number, since it uses less digits than its factorization.

122209541220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72374 (or 72359 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The spelling of 122209541220 in words is "one hundred twenty-two billion, two hundred nine million, five hundred forty-one thousand, two hundred twenty".