40312212313421 has 2 divisors, whose sum is σ = 40312212313422. Its totient is φ = 40312212313420.

The previous prime is 40312212313397. The next prime is 40312212313469. The reversal of 40312212313421 is 12431321221304.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40304582290921 + 7630022500 = 6348589^2 + 87350^2 .

It is a cyclic number.

It is not a de Polignac number, because 40312212313421 - 2³⁰ = 40311138571597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40312212313621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20156106156710 + 20156106156711.

It is an arithmetic number, because the mean of its divisors is an integer number (20156106156711).

Almost surely, 2^{40312212313421} is an apocalyptic number.

It is an amenable number.

40312212313421 is a deficient number, since it is larger than the sum of its proper divisors (1).

40312212313421 is an equidigital number, since it uses as much as digits as its factorization.

40312212313421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 40312212313421 its reverse (12431321221304), we get a palindrome (52743533534725).

The spelling of 40312212313421 in words is "forty trillion, three hundred twelve billion, two hundred twelve million, three hundred thirteen thousand, four hundred twenty-one".