122021220 has 24 divisors (see below), whose sum is σ = 341659584. Its totient is φ = 32538976.

The previous prime is 122021213. The next prime is 122021243. The reversal of 122021220 is 22120221.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 122021196 and 122021205.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1016784 + ... + 1016903.

It is an arithmetic number, because the mean of its divisors is an integer number (14235816).

Almost surely, 2^122021220 is an apocalyptic number.

122021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122021220 is an abundant number, since it is smaller than the sum of its proper divisors (219638364).

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

122021220 is a wasteful number, since it uses less digits than its factorization.

122021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033699 (or 2033697 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 122021220 is about 11046.3215596867. The cubic root of 122021220 is about 495.9963199952.

Adding to 122021220 its reverse (22120221), we get a palindrome (144141441).

Subtracting from 122021220 its reverse (22120221), we obtain a palindrome (99900999).

The spelling of 122021220 in words is "one hundred twenty-two million, twenty-one thousand, two hundred twenty".