124203121 has 4 divisors (see below), whose sum is σ = 141946432. Its totient is φ = 106459812.

The previous prime is 124203119. The next prime is 124203127. The reversal of 124203121 is 121302421.

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: 121302421 = 73 ⋅1661677.

It is a cyclic number.

It is not a de Polignac number, because 124203121 - 2¹ = 124203119 is a prime.

It is a super-2 number, since 2×124203121² = 30852830532281282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 124203095 and 124203104.

It is not an unprimeable number, because it can be changed into a prime (124203127) 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, 8871645 + ... + 8871658.

It is an arithmetic number, because the mean of its divisors is an integer number (35486608).

Almost surely, 2^124203121 is an apocalyptic number.

It is an amenable number.

124203121 is a deficient number, since it is larger than the sum of its proper divisors (17743311).

124203121 is an equidigital number, since it uses as much as digits as its factorization.

124203121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17743310.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 124203121 is about 11144.6453958841. The cubic root of 124203121 is about 498.9352288008.

Adding to 124203121 its reverse (121302421), we get a palindrome (245505542).

The spelling of 124203121 in words is "one hundred twenty-four million, two hundred three thousand, one hundred twenty-one".