421551060101 has 2 divisors, whose sum is σ = 421551060102. Its totient is φ = 421551060100.

The previous prime is 421551060067. The next prime is 421551060167. The reversal of 421551060101 is 101060155124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 306474067201 + 115076992900 = 553601^2 + 339230^2 .

It is a cyclic number.

It is not a de Polignac number, because 421551060101 - 2⁶ = 421551060037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421551060191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210775530050 + 210775530051.

It is an arithmetic number, because the mean of its divisors is an integer number (210775530051).

Almost surely, 2^421551060101 is an apocalyptic number.

It is an amenable number.

421551060101 is a deficient number, since it is larger than the sum of its proper divisors (1).

421551060101 is an equidigital number, since it uses as much as digits as its factorization.

421551060101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 26.

The spelling of 421551060101 in words is "four hundred twenty-one billion, five hundred fifty-one million, sixty thousand, one hundred one".