20110211221111 has 16 divisors (see below), whose sum is σ = 22214158836480. Its totient is φ = 18053227019520.

The previous prime is 20110211221069. The next prime is 20110211221153. The reversal of 20110211221111 is 11112211201102.

It is an interprime number because it is at equal distance from previous prime (20110211221069) and next prime (20110211221153).

It is not a de Polignac number, because 20110211221111 - 2¹⁵ = 20110211188343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110211224111) 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, 24741021 + ... + 25540918.

It is an arithmetic number, because the mean of its divisors is an integer number (1388384927280).

Almost surely, 2^{20110211221111} is an apocalyptic number.

20110211221111 is a deficient number, since it is larger than the sum of its proper divisors (2103947615369).

20110211221111 is a wasteful number, since it uses less digits than its factorization.

20110211221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50282406.

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

Adding to 20110211221111 its reverse (11112211201102), we get a palindrome (31222422422213).

The spelling of 20110211221111 in words is "twenty trillion, one hundred ten billion, two hundred eleven million, two hundred twenty-one thousand, one hundred eleven".