40221322403221 has 2 divisors, whose sum is σ = 40221322403222. Its totient is φ = 40221322403220.

The previous prime is 40221322403209. The next prime is 40221322403237. The reversal of 40221322403221 is 12230422312204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31563834148900 + 8657488254321 = 5618170^2 + 2942361^2 .

It is a cyclic number.

It is not a de Polignac number, because 40221322403221 - 2¹¹ = 40221322401173 is a prime.

It is a super-2 number, since 2×40221322403221² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40221322403221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40221722403221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20110661201610 + 20110661201611.

It is an arithmetic number, because the mean of its divisors is an integer number (20110661201611).

Almost surely, 2^{40221322403221} is an apocalyptic number.

It is an amenable number.

40221322403221 is a deficient number, since it is larger than the sum of its proper divisors (1).

40221322403221 is an equidigital number, since it uses as much as digits as its factorization.

40221322403221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 40221322403221 its reverse (12230422312204), we get a palindrome (52451744715425).

The spelling of 40221322403221 in words is "forty trillion, two hundred twenty-one billion, three hundred twenty-two million, four hundred three thousand, two hundred twenty-one".