124221020 has 72 divisors (see below), whose sum is σ = 327741792. Its totient is φ = 38712960.

The previous prime is 124220981. The next prime is 124221049. The reversal of 124221020 is 20122421.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 124220986 and 124221004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13274 + ... + 20606.

Almost surely, 2^124221020 is an apocalyptic number.

124221020 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 124221020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163870896).

124221020 is an abundant number, since it is smaller than the sum of its proper divisors (203520772).

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

124221020 is a wasteful number, since it uses less digits than its factorization.

124221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7371 (or 7358 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 124221020 is about 11145.4483983373. The cubic root of 124221020 is about 498.9591949530.

Adding to 124221020 its reverse (20122421), we get a palindrome (144343441).

The spelling of 124221020 in words is "one hundred twenty-four million, two hundred twenty-one thousand, twenty".