201021002020001 has 16 divisors (see below), whose sum is σ = 213762683232000. Its totient is φ = 188614280437440.

The previous prime is 201021002019991. The next prime is 201021002020031. The reversal of 201021002020001 is 100020200120102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 201021002020001 - 2¹⁴ = 201021002003617 is a prime.

It is a super-2 number, since 2×201021002020001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201021002020031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10989626 + ... + 22865123.

It is an arithmetic number, because the mean of its divisors is an integer number (13360167702000).

Almost surely, 2^{201021002020001} is an apocalyptic number.

It is an amenable number.

201021002020001 is a deficient number, since it is larger than the sum of its proper divisors (12741681211999).

201021002020001 is a wasteful number, since it uses less digits than its factorization.

201021002020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33859696.

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

Adding to 201021002020001 its reverse (100020200120102), we get a palindrome (301041202140103).

The spelling of 201021002020001 in words is "two hundred one trillion, twenty-one billion, two million, twenty thousand, one".