124232021 has 4 divisors (see below), whose sum is σ = 124351500. Its totient is φ = 124112544.

The previous prime is 124231999. The next prime is 124232023. The reversal of 124232021 is 120232421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120232421 = 149 ⋅806929.

It can be written as a sum of positive squares in 2 ways, for example, as 78127921 + 46104100 = 8839^2 + 6790^2 .

It is a cyclic number.

It is not a de Polignac number, because 124232021 - 2⁶ = 124231957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124232023) 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, 58166 + ... + 60263.

It is an arithmetic number, because the mean of its divisors is an integer number (31087875).

Almost surely, 2^124232021 is an apocalyptic number.

It is an amenable number.

124232021 is a deficient number, since it is larger than the sum of its proper divisors (119479).

124232021 is a wasteful number, since it uses less digits than its factorization.

124232021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119478.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 124232021 is about 11145.9419072593. The cubic root of 124232021 is about 498.9739237755.

Adding to 124232021 its reverse (120232421), we get a palindrome (244464442).

The spelling of 124232021 in words is "one hundred twenty-four million, two hundred thirty-two thousand, twenty-one".