2001002021201 has 4 divisors (see below), whose sum is σ = 2038756776372. Its totient is φ = 1963247266032.

The previous prime is 2001002021197. The next prime is 2001002021219. The reversal of 2001002021201 is 1021202001002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 723050904976 + 1277951116225 = 850324^2 + 1130465^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001002021201 - 2² = 2001002021197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001002021231) 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, 18877377506 + ... + 18877377611.

It is an arithmetic number, because the mean of its divisors is an integer number (509689194093).

Almost surely, 2^{2001002021201} is an apocalyptic number.

It is an amenable number.

2001002021201 is a deficient number, since it is larger than the sum of its proper divisors (37754755171).

2001002021201 is an equidigital number, since it uses as much as digits as its factorization.

2001002021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37754755170.

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

Adding to 2001002021201 its reverse (1021202001002), we get a palindrome (3022204022203).

The spelling of 2001002021201 in words is "two trillion, one billion, two million, twenty-one thousand, two hundred one".