211220102220111 has 64 divisors (see below), whose sum is σ = 329604593472000. Its totient is φ = 133314501058560.

The previous prime is 211220102220077. The next prime is 211220102220121. The reversal of 211220102220111 is 111022201022112.

211220102220111 is a `hidden beast` number, since 2 + 11 + 220 + 102 + 220 + 111 = 666.

It is not a de Polignac number, because 211220102220111 - 2⁷ = 211220102219983 is a prime.

It is a super-2 number, since 2×211220102220111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211220102220121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9483224271 + ... + 9483246543.

It is an arithmetic number, because the mean of its divisors is an integer number (5150071773000).

Almost surely, 2^{211220102220111} is an apocalyptic number.

211220102220111 is a deficient number, since it is larger than the sum of its proper divisors (118384491251889).

211220102220111 is a wasteful number, since it uses less digits than its factorization.

211220102220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33621 (or 33615 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 211220102220111 its reverse (111022201022112), we get a palindrome (322242303242223).

The spelling of 211220102220111 in words is "two hundred eleven trillion, two hundred twenty billion, one hundred two million, two hundred twenty thousand, one hundred eleven".