122122112220 has 72 divisors (see below), whose sum is σ = 392227499664. Its totient is φ = 30650254848.

The previous prime is 122122112209. The next prime is 122122112227. The reversal of 122122112220 is 22211221221.

It is a happy number.

122122112220 is a `hidden beast` number, since 1 + 221 + 221 + 1 + 2 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 122122112193 and 122122112202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122122112227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19951534 + ... + 19957653.

It is an arithmetic number, because the mean of its divisors is an integer number (5447604162).

Almost surely, 2^122122112220 is an apocalyptic number.

122122112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122122112220 is an abundant number, since it is smaller than the sum of its proper divisors (270105387444).

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

122122112220 is a wasteful number, since it uses less digits than its factorization.

122122112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39909219 (or 39909214 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 122122112220 its reverse (22211221221), we get a palindrome (144333333441).

The spelling of 122122112220 in words is "one hundred twenty-two billion, one hundred twenty-two million, one hundred twelve thousand, two hundred twenty".