2001111212223 has 12 divisors (see below), whose sum is σ = 2890821104080. Its totient is φ = 1333923158016.

The previous prime is 2001111212201. The next prime is 2001111212293. The reversal of 2001111212223 is 3222121111002.

It is not a de Polignac number, because 2001111212223 - 2¹⁶ = 2001111146687 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001111212196 and 2001111212205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001111212293) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12497986 + ... + 12657087.

Almost surely, 2^{2001111212223} is an apocalyptic number.

2001111212223 is a deficient number, since it is larger than the sum of its proper divisors (889709891857).

2001111212223 is a wasteful number, since it uses less digits than its factorization.

2001111212223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25163918 (or 25163915 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2001111212223 its reverse (3222121111002), we get a palindrome (5223232323225).

The spelling of 2001111212223 in words is "two trillion, one billion, one hundred eleven million, two hundred twelve thousand, two hundred twenty-three".