3124040021 has 16 divisors (see below), whose sum is σ = 3482688000. Its totient is φ = 2788658928.

The previous prime is 3124039991. The next prime is 3124040083. The reversal of 3124040021 is 1200404213.

It is a cyclic number.

It is not a de Polignac number, because 3124040021 - 2⁶ = 3124039957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3124060021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24071 + ... + 82628.

It is an arithmetic number, because the mean of its divisors is an integer number (217668000).

Almost surely, 2^3124040021 is an apocalyptic number.

It is an amenable number.

3124040021 is a deficient number, since it is larger than the sum of its proper divisors (358647979).

3124040021 is a wasteful number, since it uses less digits than its factorization.

3124040021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106808.

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

The square root of 3124040021 is about 55893.1124647751. The cubic root of 3124040021 is about 1461.8591473409.

Adding to 3124040021 its reverse (1200404213), we get a palindrome (4324444234).

The spelling of 3124040021 in words is "three billion, one hundred twenty-four million, forty thousand, twenty-one".