40321223021 has 2 divisors, whose sum is σ = 40321223022. Its totient is φ = 40321223020.

The previous prime is 40321223011. The next prime is 40321223039. The reversal of 40321223021 is 12032212304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39287600521 + 1033622500 = 198211^2 + 32150^2 .

It is a cyclic number.

It is not a de Polignac number, because 40321223021 - 2³⁰ = 39247481197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40321222984 and 40321223002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40321223011) 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 as a sum of consecutive naturals, namely, 20160611510 + 20160611511.

It is an arithmetic number, because the mean of its divisors is an integer number (20160611511).

Almost surely, 2^40321223021 is an apocalyptic number.

It is an amenable number.

40321223021 is a deficient number, since it is larger than the sum of its proper divisors (1).

40321223021 is an equidigital number, since it uses as much as digits as its factorization.

40321223021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 40321223021 its reverse (12032212304), we get a palindrome (52353435325).

The spelling of 40321223021 in words is "forty billion, three hundred twenty-one million, two hundred twenty-three thousand, twenty-one".