2001010101201 has 6 divisors (see below), whose sum is σ = 2890347923970. Its totient is φ = 1334006734128.

The previous prime is 2001010101149. The next prime is 2001010101247. The reversal of 2001010101201 is 1021010101002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1561122803601 + 439887297600 = 1249449^2 + 663240^2 .

It is not a de Polignac number, because 2001010101201 - 2⁷ = 2001010101073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 222334455689 = 2001010101201 / (2 + 0 + 0 + 1 + 0 + 1 + 0 + 1 + 0 + 1 + 2 + 0 + 1).

It is not an unprimeable number, because it can be changed into a prime (2001010101901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111167227836 + ... + 111167227853.

It is an arithmetic number, because the mean of its divisors is an integer number (481724653995).

Almost surely, 2^{2001010101201} is an apocalyptic number.

It is an amenable number.

2001010101201 is a deficient number, since it is larger than the sum of its proper divisors (889337822769).

2001010101201 is a wasteful number, since it uses less digits than its factorization.

2001010101201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222334455695 (or 222334455692 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 2001010101201 its reverse (1021010101002), we get a palindrome (3022020202203).

The spelling of 2001010101201 in words is "two trillion, one billion, ten million, one hundred one thousand, two hundred one".