201022021001 has 4 divisors (see below), whose sum is σ = 201024074112. Its totient is φ = 201019967892.

The previous prime is 201022020967. The next prime is 201022021007. The reversal of 201022021001 is 100120220102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201022021001 - 2¹⁸ = 201021758857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201022021007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 871925 + ... + 1078098.

It is an arithmetic number, because the mean of its divisors is an integer number (50256018528).

Almost surely, 2^201022021001 is an apocalyptic number.

It is an amenable number.

201022021001 is a deficient number, since it is larger than the sum of its proper divisors (2053111).

201022021001 is a wasteful number, since it uses less digits than its factorization.

201022021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053110.

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

Adding to 201022021001 its reverse (100120220102), we get a palindrome (301142241103).

The spelling of 201022021001 in words is "two hundred one billion, twenty-two million, twenty-one thousand, one".