421001525340401 has 2 divisors, whose sum is σ = 421001525340402. Its totient is φ = 421001525340400.

The previous prime is 421001525340353. The next prime is 421001525340427. The reversal of 421001525340401 is 104043525100124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 372795929189776 + 48205596150625 = 19307924^2 + 6943025^2 .

It is a cyclic number.

It is not a de Polignac number, because 421001525340401 - 2¹⁰ = 421001525339377 is a prime.

It is not a weakly prime, because it can be changed into another prime (421001525340481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210500762670200 + 210500762670201.

It is an arithmetic number, because the mean of its divisors is an integer number (210500762670201).

Almost surely, 2^{421001525340401} is an apocalyptic number.

It is an amenable number.

421001525340401 is a deficient number, since it is larger than the sum of its proper divisors (1).

421001525340401 is an equidigital number, since it uses as much as digits as its factorization.

421001525340401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 32.

The spelling of 421001525340401 in words is "four hundred twenty-one trillion, one billion, five hundred twenty-five million, three hundred forty thousand, four hundred one".