211111020220111 has 32 divisors (see below), whose sum is σ = 236275345910016. Its totient is φ = 187001294112000.

The previous prime is 211111020220103. The next prime is 211111020220123. The reversal of 211111020220111 is 111022020111112.

It is a cyclic number.

It is not a de Polignac number, because 211111020220111 - 2³ = 211111020220103 is a prime.

It is a super-2 number, since 2×211111020220111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211111020223111) 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, 2696727976 + ... + 2696806258.

It is an arithmetic number, because the mean of its divisors is an integer number (7383604559688).

Almost surely, 2^{211111020220111} is an apocalyptic number.

211111020220111 is a deficient number, since it is larger than the sum of its proper divisors (25164325689905).

211111020220111 is a wasteful number, since it uses less digits than its factorization.

211111020220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116023.

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

Adding to 211111020220111 its reverse (111022020111112), we get a palindrome (322133040331223).

The spelling of 211111020220111 in words is "two hundred eleven trillion, one hundred eleven billion, twenty million, two hundred twenty thousand, one hundred eleven".