210000201021 has 32 divisors (see below), whose sum is σ = 352676912000. Its totient is φ = 122429263104.

The previous prime is 210000200981. The next prime is 210000201077. The reversal of 210000201021 is 120102000012.

It is not a de Polignac number, because 210000201021 - 2¹¹ = 210000198973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 210000200994 and 210000201012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210000201091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15737836 + ... + 15751173.

It is an arithmetic number, because the mean of its divisors is an integer number (11021153500).

Almost surely, 2^210000201021 is an apocalyptic number.

It is an amenable number.

210000201021 is a deficient number, since it is larger than the sum of its proper divisors (142676710979).

210000201021 is a wasteful number, since it uses less digits than its factorization.

210000201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31489050 (or 31489044 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 210000201021 its reverse (120102000012), we get a palindrome (330102201033).

The spelling of 210000201021 in words is "two hundred ten billion, two hundred one thousand, twenty-one".