1212011122212 has 144 divisors (see below), whose sum is σ = 3350847636864. Its totient is φ = 366328512000.

The previous prime is 1212011122207. The next prime is 1212011122213. The reversal of 1212011122212 is 2122211102121.

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 (1212011122213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 338454262 + ... + 338457842.

It is an arithmetic number, because the mean of its divisors is an integer number (23269775256).

Almost surely, 2^{1212011122212} is an apocalyptic number.

1212011122212 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 1212011122212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1675423818432).

1212011122212 is an abundant number, since it is smaller than the sum of its proper divisors (2138836514652).

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

1212011122212 is a wasteful number, since it uses less digits than its factorization.

1212011122212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5570 (or 5565 counting only the distinct ones).

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

Adding to 1212011122212 its reverse (2122211102121), we get a palindrome (3334222224333).

The spelling of 1212011122212 in words is "one trillion, two hundred twelve billion, eleven million, one hundred twenty-two thousand, two hundred twelve".