122542220 has 24 divisors (see below), whose sum is σ = 258328224. Its totient is φ = 48828416.

The previous prime is 122542213. The next prime is 122542223. The reversal of 122542220 is 22245221.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 122542192 and 122542201.

It is not an unprimeable number, because it can be changed into a prime (122542223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6389 + ... + 16908.

It is an arithmetic number, because the mean of its divisors is an integer number (10763676).

Almost surely, 2^122542220 is an apocalyptic number.

122542220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122542220 is an abundant number, since it is smaller than the sum of its proper divisors (135786004).

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

122542220 is a wasteful number, since it uses less digits than its factorization.

122542220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23569 (or 23567 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 122542220 is about 11069.8789514610. The cubic root of 122542220 is about 496.7012442833.

Adding to 122542220 its reverse (22245221), we get a palindrome (144787441).

The spelling of 122542220 in words is "one hundred twenty-two million, five hundred forty-two thousand, two hundred twenty".