201010001021 has 8 divisors (see below), whose sum is σ = 201180860160. Its totient is φ = 200839199328.

The previous prime is 201010000943. The next prime is 201010001029. The reversal of 201010001021 is 120100010102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201010001021 - 2¹⁰ = 201009999997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201010001029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9530930 + ... + 9551996.

It is an arithmetic number, because the mean of its divisors is an integer number (25147607520).

Almost surely, 2^201010001021 is an apocalyptic number.

It is an amenable number.

201010001021 is a deficient number, since it is larger than the sum of its proper divisors (170859139).

201010001021 is a wasteful number, since it uses less digits than its factorization.

201010001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28723.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 201010001021 its reverse (120100010102), we get a palindrome (321110011123).

The spelling of 201010001021 in words is "two hundred one billion, ten million, one thousand, twenty-one".