421432240031081 has 2 divisors, whose sum is σ = 421432240031082. Its totient is φ = 421432240031080.

The previous prime is 421432240031053. The next prime is 421432240031123. The reversal of 421432240031081 is 180130042234124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 415772123221081 + 5660116810000 = 20390491^2 + 2379100^2 .

It is a cyclic number.

It is not a de Polignac number, because 421432240031081 - 2³⁴ = 421415060161897 is a prime.

It is a super-2 number, since 2×421432240031081² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (421432240031041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210716120015540 + 210716120015541.

It is an arithmetic number, because the mean of its divisors is an integer number (210716120015541).

Almost surely, 2^{421432240031081} is an apocalyptic number.

It is an amenable number.

421432240031081 is a deficient number, since it is larger than the sum of its proper divisors (1).

421432240031081 is an equidigital number, since it uses as much as digits as its factorization.

421432240031081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 35.

The spelling of 421432240031081 in words is "four hundred twenty-one trillion, four hundred thirty-two billion, two hundred forty million, thirty-one thousand, eighty-one".