401221151 has 2 divisors, whose sum is σ = 401221152. Its totient is φ = 401221150.

The previous prime is 401221147. The next prime is 401221159. The reversal of 401221151 is 151122104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401221151 - 2² = 401221147 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401221159) 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, 200610575 + 200610576.

It is an arithmetic number, because the mean of its divisors is an integer number (200610576).

Almost surely, 2^401221151 is an apocalyptic number.

401221151 is a deficient number, since it is larger than the sum of its proper divisors (1).

401221151 is an equidigital number, since it uses as much as digits as its factorization.

401221151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 401221151 is about 20030.5055103460. The cubic root of 401221151 is about 737.5553311355. Note that the first 3 decimals are identical.

Adding to 401221151 its reverse (151122104), we get a palindrome (552343255).

The spelling of 401221151 in words is "four hundred one million, two hundred twenty-one thousand, one hundred fifty-one".