400421522141 has 2 divisors, whose sum is σ = 400421522142. Its totient is φ = 400421522140.

The previous prime is 400421522089. The next prime is 400421522167. The reversal of 400421522141 is 141225124004.

It is an a-pointer prime, because the next prime (400421522167) can be obtained adding 400421522141 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 340418570116 + 60002952025 = 583454^2 + 244955^2 .

It is a cyclic number.

It is not a de Polignac number, because 400421522141 - 2¹⁰ = 400421521117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 400421522141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400421522191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200210761070 + 200210761071.

It is an arithmetic number, because the mean of its divisors is an integer number (200210761071).

Almost surely, 2^400421522141 is an apocalyptic number.

It is an amenable number.

400421522141 is a deficient number, since it is larger than the sum of its proper divisors (1).

400421522141 is an equidigital number, since it uses as much as digits as its factorization.

400421522141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 400421522141 its reverse (141225124004), we get a palindrome (541646646145).

The spelling of 400421522141 in words is "four hundred billion, four hundred twenty-one million, five hundred twenty-two thousand, one hundred forty-one".