401154422221321 has 2 divisors, whose sum is σ = 401154422221322. Its totient is φ = 401154422221320.

The previous prime is 401154422221309. The next prime is 401154422221403. The reversal of 401154422221321 is 123122224451104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 273824389569600 + 127330032651721 = 16547640^2 + 11284061^2 .

It is a cyclic number.

It is not a de Polignac number, because 401154422221321 - 2⁷ = 401154422221193 is a prime.

It is not a weakly prime, because it can be changed into another prime (401154422251321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200577211110660 + 200577211110661.

It is an arithmetic number, because the mean of its divisors is an integer number (200577211110661).

Almost surely, 2^{401154422221321} is an apocalyptic number.

It is an amenable number.

401154422221321 is a deficient number, since it is larger than the sum of its proper divisors (1).

401154422221321 is an equidigital number, since it uses as much as digits as its factorization.

401154422221321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30720, while the sum is 34.

Adding to 401154422221321 its reverse (123122224451104), we get a palindrome (524276646672425).

The spelling of 401154422221321 in words is "four hundred one trillion, one hundred fifty-four billion, four hundred twenty-two million, two hundred twenty-one thousand, three hundred twenty-one".