20110221102111 has 16 divisors (see below), whose sum is σ = 30647338514688. Its totient is φ = 11490357888000.

The previous prime is 20110221102079. The next prime is 20110221102113. The reversal of 20110221102111 is 11120112201102.

It is a happy number.

It is not a de Polignac number, because 20110221102111 - 2⁵ = 20110221102079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110221102113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49669725 + ... + 50072966.

It is an arithmetic number, because the mean of its divisors is an integer number (1915458657168).

Almost surely, 2^{20110221102111} is an apocalyptic number.

20110221102111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20110221102111 is a deficient number, since it is larger than the sum of its proper divisors (10537117412577).

20110221102111 is an equidigital number, since it uses as much as digits as its factorization.

20110221102111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99752302.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20110221102111 its reverse (11120112201102), we get a palindrome (31230333303213).

The spelling of 20110221102111 in words is "twenty trillion, one hundred ten billion, two hundred twenty-one million, one hundred two thousand, one hundred eleven".