124100021 has 8 divisors (see below), whose sum is σ = 127162464. Its totient is φ = 121045680.

The previous prime is 124100003. The next prime is 124100027. The reversal of 124100021 is 120001421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 124100021 - 2¹⁴ = 124083637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 124099975 and 124100011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124100027) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 38930 + ... + 41996.

It is an arithmetic number, because the mean of its divisors is an integer number (15895308).

Almost surely, 2^124100021 is an apocalyptic number.

It is an amenable number.

124100021 is a deficient number, since it is larger than the sum of its proper divisors (3062443).

124100021 is an equidigital number, since it uses as much as digits as its factorization.

124100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4051.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 124100021 is about 11140.0188958547. The cubic root of 124100021 is about 498.7971365596.

Adding to 124100021 its reverse (120001421), we get a palindrome (244101442).

The spelling of 124100021 in words is "one hundred twenty-four million, one hundred thousand, twenty-one".