40450142221 has 2 divisors, whose sum is σ = 40450142222. Its totient is φ = 40450142220.

The previous prime is 40450142203. The next prime is 40450142233. The reversal of 40450142221 is 12224105404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29787308100 + 10662834121 = 172590^2 + 103261^2 .

It is a cyclic number.

It is not a de Polignac number, because 40450142221 - 2¹⁹ = 40449617933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40450146221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20225071110 + 20225071111.

It is an arithmetic number, because the mean of its divisors is an integer number (20225071111).

Almost surely, 2^40450142221 is an apocalyptic number.

It is an amenable number.

40450142221 is a deficient number, since it is larger than the sum of its proper divisors (1).

40450142221 is an equidigital number, since it uses as much as digits as its factorization.

40450142221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 40450142221 its reverse (12224105404), we get a palindrome (52674247625).

The spelling of 40450142221 in words is "forty billion, four hundred fifty million, one hundred forty-two thousand, two hundred twenty-one".