401111322421 has 2 divisors, whose sum is σ = 401111322422. Its totient is φ = 401111322420.

The previous prime is 401111322371. The next prime is 401111322433. The reversal of 401111322421 is 124223111104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 358697979396 + 42413343025 = 598914^2 + 205945^2 .

It is a cyclic number.

It is not a de Polignac number, because 401111322421 - 2³³ = 392521387829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 401111322392 and 401111322401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401111328421) 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, 200555661210 + 200555661211.

It is an arithmetic number, because the mean of its divisors is an integer number (200555661211).

Almost surely, 2^401111322421 is an apocalyptic number.

It is an amenable number.

401111322421 is a deficient number, since it is larger than the sum of its proper divisors (1).

401111322421 is an equidigital number, since it uses as much as digits as its factorization.

401111322421 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 22.

Adding to 401111322421 its reverse (124223111104), we get a palindrome (525334433525).

The spelling of 401111322421 in words is "four hundred one billion, one hundred eleven million, three hundred twenty-two thousand, four hundred twenty-one".