2400021024021 has 6 divisors (see below), whose sum is σ = 3466697034710. Its totient is φ = 1600014016008.

The previous prime is 2400021024013. The next prime is 2400021024031. The reversal of 2400021024021 is 1204201200042.

2400021024021 is a `hidden beast` number, since 2 + 400 + 0 + 2 + 1 + 0 + 240 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2399899803921 + 121220100 = 1549161^2 + 11010^2 .

It is not a de Polignac number, because 2400021024021 - 2³ = 2400021024013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2400021023985 and 2400021024003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2400021024001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 133334501326 + ... + 133334501343.

Almost surely, 2^{2400021024021} is an apocalyptic number.

It is an amenable number.

2400021024021 is a deficient number, since it is larger than the sum of its proper divisors (1066676010689).

2400021024021 is a wasteful number, since it uses less digits than its factorization.

2400021024021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266669002675 (or 266669002672 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 2400021024021 its reverse (1204201200042), we get a palindrome (3604222224063).

The spelling of 2400021024021 in words is "two trillion, four hundred billion, twenty-one million, twenty-four thousand, twenty-one".