2101220111111 has 8 divisors (see below), whose sum is σ = 2297255969424. Its totient is φ = 1906020227520.

The previous prime is 2101220111087. The next prime is 2101220111113. The reversal of 2101220111111 is 1111110221012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101220111111 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 (2101220111113) 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 7 ways as a sum of consecutive naturals, for example, 208988420 + ... + 208998473.

It is an arithmetic number, because the mean of its divisors is an integer number (287156996178).

Almost surely, 2^{2101220111111} is an apocalyptic number.

2101220111111 is a deficient number, since it is larger than the sum of its proper divisors (196035858313).

2101220111111 is a wasteful number, since it uses less digits than its factorization.

2101220111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417987361.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 2101220111111 its reverse (1111110221012), we get a palindrome (3212330332123).

The spelling of 2101220111111 in words is "two trillion, one hundred one billion, two hundred twenty million, one hundred eleven thousand, one hundred eleven".