2001222221103 has 24 divisors (see below), whose sum is σ = 3303851286528. Its totient is φ = 1143470279952.

The previous prime is 2001222221087. The next prime is 2001222221161. The reversal of 2001222221103 is 3011222221002.

It is not a de Polignac number, because 2001222221103 - 2⁴ = 2001222221087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001222221303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 327951 + ... + 2027312.

It is an arithmetic number, because the mean of its divisors is an integer number (137660470272).

Almost surely, 2^{2001222221103} is an apocalyptic number.

2001222221103 is a deficient number, since it is larger than the sum of its proper divisors (1302629065425).

2001222221103 is a wasteful number, since it uses less digits than its factorization.

2001222221103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2368763 (or 2368760 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 2001222221103 its reverse (3011222221002), we get a palindrome (5012444442105).

It can be divided in two parts, 20012 and 22221103, that added together give a triangular number (22241115 = T₆₆₆₉).

The spelling of 2001222221103 in words is "two trillion, one billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred three".