40242024040021 has 2 divisors, whose sum is σ = 40242024040022. Its totient is φ = 40242024040020.

The previous prime is 40242024040007. The next prime is 40242024040109. The reversal of 40242024040021 is 12004042024204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24260658611121 + 15981365428900 = 4925511^2 + 3997670^2 .

It is a cyclic number.

It is not a de Polignac number, because 40242024040021 - 2³⁵ = 40207664301653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40242024040921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20121012020010 + 20121012020011.

It is an arithmetic number, because the mean of its divisors is an integer number (20121012020011).

Almost surely, 2^{40242024040021} is an apocalyptic number.

It is an amenable number.

40242024040021 is a deficient number, since it is larger than the sum of its proper divisors (1).

40242024040021 is an equidigital number, since it uses as much as digits as its factorization.

40242024040021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4096, while the sum is 25.

Adding to 40242024040021 its reverse (12004042024204), we get a palindrome (52246066064225).

The spelling of 40242024040021 in words is "forty trillion, two hundred forty-two billion, twenty-four million, forty thousand, twenty-one".