40221322121 has 2 divisors, whose sum is σ = 40221322122. Its totient is φ = 40221322120.

The previous prime is 40221322111. The next prime is 40221322139. The reversal of 40221322121 is 12122312204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25812920896 + 14408401225 = 160664^2 + 120035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40221322121 is a prime.

It is a super-2 number, since 2×40221322121² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40221322093 and 40221322102.

It is not a weakly prime, because it can be changed into another prime (40221322111) 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, 20110661060 + 20110661061.

It is an arithmetic number, because the mean of its divisors is an integer number (20110661061).

Almost surely, 2^40221322121 is an apocalyptic number.

It is an amenable number.

40221322121 is a deficient number, since it is larger than the sum of its proper divisors (1).

40221322121 is an equidigital number, since it uses as much as digits as its factorization.

40221322121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 40221322121 its reverse (12122312204), we get a palindrome (52343634325).

The spelling of 40221322121 in words is "forty billion, two hundred twenty-one million, three hundred twenty-two thousand, one hundred twenty-one".