124121421 has 24 divisors (see below), whose sum is σ = 190496280. Its totient is φ = 77728896.

The previous prime is 124121399. The next prime is 124121429.

124121421 is a `hidden beast` number, since 1 + 241 + 2 + 1 + 421 = 666.

124121421 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 28355625 + 95765796 = 5325^2 + 9786^2 .

It is not a de Polignac number, because 124121421 - 2¹⁸ = 123859277 is a prime.

It is a super-2 number, since 2×124121421² = 30812254302118482, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 124121394 and 124121403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124121429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3231 + ... + 16083.

It is an arithmetic number, because the mean of its divisors is an integer number (7937345).

Almost surely, 2^124121421 is an apocalyptic number.

It is an amenable number.

124121421 is a deficient number, since it is larger than the sum of its proper divisors (66374859).

124121421 is a wasteful number, since it uses less digits than its factorization.

124121421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12925 (or 12922 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 124121421 is about 11140.9793555145. The cubic root of 124121421 is about 498.8258060289.

The spelling of 124121421 in words is "one hundred twenty-four million, one hundred twenty-one thousand, four hundred twenty-one".