20211102111111 has 16 divisors (see below), whose sum is σ = 27819865550304. Its totient is φ = 13041977094144.

The previous prime is 20211102111097. The next prime is 20211102111121. The reversal of 20211102111111 is 11111120111202.

It is not a de Polignac number, because 20211102111111 - 2⁶ = 20211102111047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211102111121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471693606 + ... + 471736451.

It is an arithmetic number, because the mean of its divisors is an integer number (1738741596894).

Almost surely, 2^{20211102111111} is an apocalyptic number.

20211102111111 is a deficient number, since it is larger than the sum of its proper divisors (7608763439193).

20211102111111 is a wasteful number, since it uses less digits than its factorization.

20211102111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943430290.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 20211102111111 its reverse (11111120111202), we get a palindrome (31322222222313).

The spelling of 20211102111111 in words is "twenty trillion, two hundred eleven billion, one hundred two million, one hundred eleven thousand, one hundred eleven".