40220201081 has 2 divisors, whose sum is σ = 40220201082. Its totient is φ = 40220201080.

The previous prime is 40220201027. The next prime is 40220201117. The reversal of 40220201081 is 18010202204.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32010935056 + 8209266025 = 178916^2 + 90605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40220201081 is a prime.

It is a super-2 number, since 2×40220201081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40220207081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20110100540 + 20110100541.

It is an arithmetic number, because the mean of its divisors is an integer number (20110100541).

Almost surely, 2^40220201081 is an apocalyptic number.

It is an amenable number.

40220201081 is a deficient number, since it is larger than the sum of its proper divisors (1).

40220201081 is an equidigital number, since it uses as much as digits as its factorization.

40220201081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 40220201081 its reverse (18010202204), we get a palindrome (58230403285).

The spelling of 40220201081 in words is "forty billion, two hundred twenty million, two hundred one thousand, eighty-one".