2001220111110 has 64 divisors (see below), whose sum is σ = 5381167820544. Its totient is φ = 472032259200.

The previous prime is 2001220111061. The next prime is 2001220111117. The reversal of 2001220111110 is 111110221002.

It is a super-2 number, since 2×2001220111110² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001220111117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81937836 + ... + 81962255.

It is an arithmetic number, because the mean of its divisors is an integer number (84080747196).

Almost surely, 2^{2001220111110} is an apocalyptic number.

2001220111110 is an abundant number, since it is smaller than the sum of its proper divisors (3379947709434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001220111110 is a wasteful number, since it uses less digits than its factorization.

2001220111110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163900149.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2001220111110 its reverse (111110221002), we get a palindrome (2112330332112).

The spelling of 2001220111110 in words is "two trillion, one billion, two hundred twenty million, one hundred eleven thousand, one hundred ten".