2400123021 has 8 divisors (see below), whose sum is σ = 3200403360. Its totient is φ = 1599962352.

The previous prime is 2400123017. The next prime is 2400123023. The reversal of 2400123021 is 1203210042.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2400123021 - 2² = 2400123017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2400123023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40690 + ... + 80348.

It is an arithmetic number, because the mean of its divisors is an integer number (400050420).

Almost surely, 2^2400123021 is an apocalyptic number.

It is an amenable number.

2400123021 is a deficient number, since it is larger than the sum of its proper divisors (800280339).

2400123021 is a wasteful number, since it uses less digits than its factorization.

2400123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59835.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2400123021 is about 48991.0504173977. The cubic root of 2400123021 is about 1338.8887759710. Note that the first 3 decimals are identical.

Adding to 2400123021 its reverse (1203210042), we get a palindrome (3603333063).

The spelling of 2400123021 in words is "two billion, four hundred million, one hundred twenty-three thousand, twenty-one".