124213021020 has 96 divisors (see below), whose sum is σ = 421571485440. Its totient is φ = 30112246080.

The previous prime is 124213020979. The next prime is 124213021021. The reversal of 124213021020 is 20120312421.

It is a happy number.

124213021020 is a `hidden beast` number, since 1 + 2 + 421 + 30 + 210 + 2 + 0 = 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 = 124213020984 and 124213021002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124213021021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10449702 + ... + 10461581.

It is an arithmetic number, because the mean of its divisors is an integer number (4391369640).

Almost surely, 2^124213021020 is an apocalyptic number.

124213021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

124213021020 is an abundant number, since it is smaller than the sum of its proper divisors (297358464420).

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

124213021020 is a wasteful number, since it uses less digits than its factorization.

124213021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20911312 (or 20911304 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 124213021020 its reverse (20120312421), we get a palindrome (144333333441).

The spelling of 124213021020 in words is "one hundred twenty-four billion, two hundred thirteen million, twenty-one thousand, twenty".