111211012220212 has 6 divisors (see below), whose sum is σ = 194619271385378. Its totient is φ = 55605506110104.

The previous prime is 111211012220183. The next prime is 111211012220219. The reversal of 111211012220212 is 212022210112111.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 102932306549136 + 8278705671076 = 10145556^2 + 2877274^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 111211012220212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111211012220219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13901376527523 + ... + 13901376527530.

Almost surely, 2^{111211012220212} is an apocalyptic number.

It is an amenable number.

111211012220212 is a deficient number, since it is larger than the sum of its proper divisors (83408259165166).

111211012220212 is a wasteful number, since it uses less digits than its factorization.

111211012220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27802753055057 (or 27802753055055 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111211012220212 its reverse (212022210112111), we get a palindrome (323233222332323).

The spelling of 111211012220212 in words is "one hundred eleven trillion, two hundred eleven billion, twelve million, two hundred twenty thousand, two hundred twelve".