201122110111212 has 48 divisors (see below), whose sum is σ = 521430399006720. Its totient is φ = 67040355440016.

The previous prime is 201122110111207. The next prime is 201122110111217. The reversal of 201122110111212 is 212111011221102.

It is a happy number.

201122110111212 is a `hidden beast` number, since 20 + 112 + 211 + 0 + 111 + 212 = 666.

It is an interprime number because it is at equal distance from previous prime (201122110111207) and next prime (201122110111217).

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

It is not an unprimeable number, because it can be changed into a prime (201122110111217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16508173 + ... + 25976219.

It is an arithmetic number, because the mean of its divisors is an integer number (10863133312640).

Almost surely, 2^{201122110111212} is an apocalyptic number.

It is an amenable number.

201122110111212 is an abundant number, since it is smaller than the sum of its proper divisors (320308288895508).

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

201122110111212 is a wasteful number, since it uses less digits than its factorization.

201122110111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9664747 (or 9664739 counting only the distinct ones).

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

Adding to 201122110111212 its reverse (212111011221102), we get a palindrome (413233121332314).

The spelling of 201122110111212 in words is "two hundred one trillion, one hundred twenty-two billion, one hundred ten million, one hundred eleven thousand, two hundred twelve".