1212222211110 has 192 divisors, whose sum is σ = 3311497111104. Its totient is φ = 319028544000.

The previous prime is 1212222211087. The next prime is 1212222211111. The reversal of 1212222211110 is 111122222121.

1212222211110 is a `hidden beast` number, since 121 + 2 + 222 + 211 + 110 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212222211111) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 77793520 + ... + 77809100.

It is an arithmetic number, because the mean of its divisors is an integer number (17247380787).

Almost surely, 2^{1212222211110} is an apocalyptic number.

1212222211110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212222211110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1655748555552).

1212222211110 is an abundant number, since it is smaller than the sum of its proper divisors (2099274899994).

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

1212222211110 is a wasteful number, since it uses less digits than its factorization.

1212222211110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16021 (or 16009 counting only the distinct ones).

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

Adding to 1212222211110 its reverse (111122222121), we get a palindrome (1323344433231).

It can be divided in two parts, 12122222111 and 10, that added together give a palindrome (12122222121).

The spelling of 1212222211110 in words is "one trillion, two hundred twelve billion, two hundred twenty-two million, two hundred eleven thousand, one hundred ten".