21140124120 has 64 divisors (see below), whose sum is σ = 70467084000. Its totient is φ = 5637366144.

The previous prime is 21140124107. The next prime is 21140124127. The reversal of 21140124120 is 2142104112.

21140124120 is a `hidden beast` number, since 2 + 1 + 1 + 401 + 241 + 20 = 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 = 21140124093 and 21140124102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21140124127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9786015 + ... + 9788174.

Almost surely, 2^21140124120 is an apocalyptic number.

21140124120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21140124120 is an abundant number, since it is smaller than the sum of its proper divisors (49326959880).

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

21140124120 is a wasteful number, since it uses less digits than its factorization.

21140124120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19574209 (or 19574199 counting only the distinct ones).

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

Adding to 21140124120 its reverse (2142104112), we get a palindrome (23282228232).

The spelling of 21140124120 in words is "twenty-one billion, one hundred forty million, one hundred twenty-four thousand, one hundred twenty".