40420404201217 has 2 divisors, whose sum is σ = 40420404201218. Its totient is φ = 40420404201216.

The previous prime is 40420404201113. The next prime is 40420404201271. The reversal of 40420404201217 is 71210240402404.

Together with next prime (40420404201271) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39047513937601 + 1372890263616 = 6248801^2 + 1171704^2 .

It is a cyclic number.

It is not a de Polignac number, because 40420404201217 - 2¹⁹ = 40420403676929 is a prime.

It is not a weakly prime, because it can be changed into another prime (40420404207217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20210202100608 + 20210202100609.

It is an arithmetic number, because the mean of its divisors is an integer number (20210202100609).

Almost surely, 2^{40420404201217} is an apocalyptic number.

It is an amenable number.

40420404201217 is a deficient number, since it is larger than the sum of its proper divisors (1).

40420404201217 is an equidigital number, since it uses as much as digits as its factorization.

40420404201217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14336, while the sum is 31.

The spelling of 40420404201217 in words is "forty trillion, four hundred twenty billion, four hundred four million, two hundred one thousand, two hundred seventeen".