124200121 has 4 divisors (see below), whose sum is σ = 125696592. Its totient is φ = 122703652.

The previous prime is 124200119. The next prime is 124200151. The reversal of 124200121 is 121002421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121002421 = 1613 ⋅75017.

It is a cyclic number.

It is not a de Polignac number, because 124200121 - 2¹ = 124200119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124200101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 748111 + ... + 748276.

It is an arithmetic number, because the mean of its divisors is an integer number (31424148).

Almost surely, 2^124200121 is an apocalyptic number.

It is an amenable number.

124200121 is a deficient number, since it is larger than the sum of its proper divisors (1496471).

124200121 is an equidigital number, since it uses as much as digits as its factorization.

124200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496470.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 124200121 is about 11144.5108012869. The cubic root of 124200121 is about 498.9312116776.

Adding to 124200121 its reverse (121002421), we get a palindrome (245202542).

The spelling of 124200121 in words is "one hundred twenty-four million, two hundred thousand, one hundred twenty-one".