2001201202021 has 8 divisors (see below), whose sum is σ = 2287690094144. Its totient is φ = 1714863061440.

The previous prime is 2001201202009. The next prime is 2001201202031. The reversal of 2001201202021 is 1202021021002.

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 not a de Polignac number, because 2001201202021 - 2⁹ = 2001201201509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001201201992 and 2001201202010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001201202031) 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, 37659435 + ... + 37712536.

It is an arithmetic number, because the mean of its divisors is an integer number (285961261768).

Almost surely, 2^{2001201202021} is an apocalyptic number.

It is an amenable number.

2001201202021 is a deficient number, since it is larger than the sum of its proper divisors (286488892123).

2001201202021 is an equidigital number, since it uses as much as digits as its factorization.

2001201202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75375771.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2001201202021 its reverse (1202021021002), we get a palindrome (3203222223023).

The spelling of 2001201202021 in words is "two trillion, one billion, two hundred one million, two hundred two thousand, twenty-one".