40211406421 has 2 divisors, whose sum is σ = 40211406422. Its totient is φ = 40211406420.

The previous prime is 40211406419. The next prime is 40211406457. The reversal of 40211406421 is 12460411204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27035580625 + 13175825796 = 164425^2 + 114786^2 .

It is a cyclic number.

It is not a de Polignac number, because 40211406421 - 2¹ = 40211406419 is a prime.

Together with 40211406419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40211406481) 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, 20105703210 + 20105703211.

It is an arithmetic number, because the mean of its divisors is an integer number (20105703211).

Almost surely, 2^40211406421 is an apocalyptic number.

It is an amenable number.

40211406421 is a deficient number, since it is larger than the sum of its proper divisors (1).

40211406421 is an equidigital number, since it uses as much as digits as its factorization.

40211406421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 40211406421 its reverse (12460411204), we get a palindrome (52671817625).

The spelling of 40211406421 in words is "forty billion, two hundred eleven million, four hundred six thousand, four hundred twenty-one".