421010101 has 16 divisors (see below), whose sum is σ = 456496128. Its totient is φ = 387129600.

The previous prime is 421010071. The next prime is 421010123. The reversal of 421010101 is 101010124.

It is a cyclic number.

It is not a de Polignac number, because 421010101 - 2¹¹ = 421008053 is a prime.

It is a Duffinian number.

421010101 is a modest number, since divided by 10101 gives 421 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421010701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110061 + ... + 113821.

It is an arithmetic number, because the mean of its divisors is an integer number (28531008).

Almost surely, 2^421010101 is an apocalyptic number.

It is an amenable number.

421010101 is a deficient number, since it is larger than the sum of its proper divisors (35486027).

421010101 is a wasteful number, since it uses less digits than its factorization.

421010101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3972.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 421010101 is about 20518.5306735156. The cubic root of 421010101 is about 749.4871166067.

Adding to 421010101 its reverse (101010124), we get a palindrome (522020225).

The spelling of 421010101 in words is "four hundred twenty-one million, ten thousand, one hundred one".