40002422021 has 2 divisors, whose sum is σ = 40002422022. Its totient is φ = 40002422020.

The previous prime is 40002421993. The next prime is 40002422059. The reversal of 40002422021 is 12022420004.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36246448225 + 3755973796 = 190385^2 + 61286^2 .

It is a cyclic number.

It is not a de Polignac number, because 40002422021 - 2¹⁴ = 40002405637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40002422221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20001211010 + 20001211011.

It is an arithmetic number, because the mean of its divisors is an integer number (20001211011).

Almost surely, 2^40002422021 is an apocalyptic number.

It is an amenable number.

40002422021 is a deficient number, since it is larger than the sum of its proper divisors (1).

40002422021 is an equidigital number, since it uses as much as digits as its factorization.

40002422021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 40002422021 its reverse (12022420004), we get a palindrome (52024842025).

The spelling of 40002422021 in words is "forty billion, two million, four hundred twenty-two thousand, twenty-one".