201021202001 has 8 divisors (see below), whose sum is σ = 204401524608. Its totient is φ = 197643618000.

The previous prime is 201021201989. The next prime is 201021202007. The reversal of 201021202001 is 100202120102.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201021202001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201021202007) 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, 536345 + ... + 830486.

It is an arithmetic number, because the mean of its divisors is an integer number (25550190576).

Almost surely, 2^201021202001 is an apocalyptic number.

It is an amenable number.

201021202001 is a deficient number, since it is larger than the sum of its proper divisors (3380322607).

201021202001 is a wasteful number, since it uses less digits than its factorization.

201021202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369303.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 201021202001 its reverse (100202120102), we get a palindrome (301223322103).

The spelling of 201021202001 in words is "two hundred one billion, twenty-one million, two hundred two thousand, one".