124021121 has 4 divisors (see below), whose sum is σ = 141738432. Its totient is φ = 106303812.

The previous prime is 124021057. The next prime is 124021123. The reversal of 124021121 is 121120421.

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: 121120421 = 19 ⋅6374759.

It is a cyclic number.

It is not a de Polignac number, because 124021121 - 2⁶ = 124021057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 124021096 and 124021105.

It is not an unprimeable number, because it can be changed into a prime (124021123) 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, 8858645 + ... + 8858658.

It is an arithmetic number, because the mean of its divisors is an integer number (35434608).

Almost surely, 2^124021121 is an apocalyptic number.

It is an amenable number.

124021121 is a deficient number, since it is larger than the sum of its proper divisors (17717311).

124021121 is an equidigital number, since it uses as much as digits as its factorization.

124021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17717310.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 124021121 is about 11136.4770461758. The cubic root of 124021121 is about 498.6914061521.

Adding to 124021121 its reverse (121120421), we get a palindrome (245141542).

The spelling of 124021121 in words is "one hundred twenty-four million, twenty-one thousand, one hundred twenty-one".