40221145361 has 2 divisors, whose sum is σ = 40221145362. Its totient is φ = 40221145360.

The previous prime is 40221145243. The next prime is 40221145369. The reversal of 40221145361 is 16354112204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35464422400 + 4756722961 = 188320^2 + 68969^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40221145361 is a prime.

It is not a weakly prime, because it can be changed into another prime (40221145369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20110572680 + 20110572681.

It is an arithmetic number, because the mean of its divisors is an integer number (20110572681).

Almost surely, 2^40221145361 is an apocalyptic number.

It is an amenable number.

40221145361 is a deficient number, since it is larger than the sum of its proper divisors (1).

40221145361 is an equidigital number, since it uses as much as digits as its factorization.

40221145361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 40221145361 its reverse (16354112204), we get a palindrome (56575257565).

The spelling of 40221145361 in words is "forty billion, two hundred twenty-one million, one hundred forty-five thousand, three hundred sixty-one".