210201021021 has 16 divisors (see below), whose sum is σ = 292489739136. Its totient is φ = 134024664576.

The previous prime is 210201021013. The next prime is 210201021047. The reversal of 210201021021 is 120120102012.

210201021021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 210201021021 - 2³ = 210201021013 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 210201020988 and 210201021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210201021061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 386721 + ... + 754953.

It is an arithmetic number, because the mean of its divisors is an integer number (18280608696).

Almost surely, 2^210201021021 is an apocalyptic number.

It is an amenable number.

210201021021 is a deficient number, since it is larger than the sum of its proper divisors (82288718115).

210201021021 is a wasteful number, since it uses less digits than its factorization.

210201021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376532.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 210201021021 its reverse (120120102012), we get a palindrome (330321123033).

The spelling of 210201021021 in words is "two hundred ten billion, two hundred one million, twenty-one thousand, twenty-one".