40324012021 has 2 divisors, whose sum is σ = 40324012022. Its totient is φ = 40324012020.

The previous prime is 40324012013. The next prime is 40324012033. The reversal of 40324012021 is 12021042304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30406640625 + 9917371396 = 174375^2 + 99586^2 .

It is a cyclic number.

It is not a de Polignac number, because 40324012021 - 2³ = 40324012013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40324012021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40324012621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20162006010 + 20162006011.

It is an arithmetic number, because the mean of its divisors is an integer number (20162006011).

Almost surely, 2^40324012021 is an apocalyptic number.

It is an amenable number.

40324012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

40324012021 is an equidigital number, since it uses as much as digits as its factorization.

40324012021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 40324012021 its reverse (12021042304), we get a palindrome (52345054325).

The spelling of 40324012021 in words is "forty billion, three hundred twenty-four million, twelve thousand, twenty-one".