1212102222012 has 144 divisors (see below), whose sum is σ = 3394622859264. Its totient is φ = 361611648000.

The previous prime is 1212102221977. The next prime is 1212102222059. The reversal of 1212102222012 is 2102222012121.

It is a happy number.

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 47 ways as a sum of consecutive naturals, for example, 7254087 + ... + 7419297.

It is an arithmetic number, because the mean of its divisors is an integer number (23573769856).

Almost surely, 2^{1212102222012} is an apocalyptic number.

1212102222012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212102222012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1697311429632).

1212102222012 is an abundant number, since it is smaller than the sum of its proper divisors (2182520637252).

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

1212102222012 is a wasteful number, since it uses less digits than its factorization.

1212102222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165520 (or 165515 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1212102222012 its reverse (2102222012121), we get a palindrome (3314324234133).

It can be divided in two parts, 121 and 2102222012, that multiplied together give a palindrome (254368863452).

The spelling of 1212102222012 in words is "one trillion, two hundred twelve billion, one hundred two million, two hundred twenty-two thousand, twelve".