210421042101 has 24 divisors (see below), whose sum is σ = 311139656256. Its totient is φ = 136961193600.

The previous prime is 210421042031. The next prime is 210421042121. The reversal of 210421042101 is 101240124012.

It is not a de Polignac number, because 210421042101 - 2¹⁸ = 210420779957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210421042121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 825501 + ... + 1049901.

It is an arithmetic number, because the mean of its divisors is an integer number (12964152344).

Almost surely, 2^210421042101 is an apocalyptic number.

It is an amenable number.

210421042101 is a deficient number, since it is larger than the sum of its proper divisors (100718614155).

210421042101 is a wasteful number, since it uses less digits than its factorization.

210421042101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226873 (or 226870 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 210421042101 its reverse (101240124012), we get a palindrome (311661166113).

The spelling of 210421042101 in words is "two hundred ten billion, four hundred twenty-one million, forty-two thousand, one hundred one".