2001201021223 has 4 divisors (see below), whose sum is σ = 2001594421440. Its totient is φ = 2000807621008.

The previous prime is 2001201021179. The next prime is 2001201021229. The reversal of 2001201021223 is 3221201021002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2001201021223 - 2⁹ = 2001201020711 is a prime.

It is a super-3 number, since 3×2001201021223³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001201021197 and 2001201021206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001201021229) 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, 196692478 + ... + 196702651.

It is an arithmetic number, because the mean of its divisors is an integer number (500398605360).

Almost surely, 2^{2001201021223} is an apocalyptic number.

2001201021223 is a deficient number, since it is larger than the sum of its proper divisors (393400217).

2001201021223 is an equidigital number, since it uses as much as digits as its factorization.

2001201021223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393400216.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 2001201021223 its reverse (3221201021002), we get a palindrome (5222402042225).

The spelling of 2001201021223 in words is "two trillion, one billion, two hundred one million, twenty-one thousand, two hundred twenty-three".