211111222011102 has 48 divisors (see below), whose sum is σ = 525671997402240. Its totient is φ = 59980522767696.

The previous prime is 211111222011073. The next prime is 211111222011167. The reversal of 211111222011102 is 201110222111112.

It is a happy number.

It is a super-2 number, since 2×211111222011102² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 4680105628 + ... + 4680150735.

It is an arithmetic number, because the mean of its divisors is an integer number (10951499945880).

Almost surely, 2^{211111222011102} is an apocalyptic number.

211111222011102 is an abundant number, since it is smaller than the sum of its proper divisors (314560775391138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211111222011102 is a wasteful number, since it uses less digits than its factorization.

211111222011102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9360256557 (or 9360256554 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 211111222011102 its reverse (201110222111112), we get a palindrome (412221444122214).

The spelling of 211111222011102 in words is "two hundred eleven trillion, one hundred eleven billion, two hundred twenty-two million, eleven thousand, one hundred two".