1212112022120 has 64 divisors (see below), whose sum is σ = 2823040069200. Its totient is φ = 467836508160.

The previous prime is 1212112022113. The next prime is 1212112022131. The reversal of 1212112022120 is 212202112121.

It can be written as a sum of positive squares in 8 ways, for example, as 834105930436 + 378006091684 = 913294^2 + 614822^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1558052 + ... + 2202668.

Almost surely, 2^{1212112022120} is an apocalyptic number.

1212112022120 is a gapful number since it is divisible by the number (10) 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 1212112022120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1411520034600).

1212112022120 is an abundant number, since it is smaller than the sum of its proper divisors (1610928047080).

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

1212112022120 is a wasteful number, since it uses less digits than its factorization.

1212112022120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646278 (or 646274 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1212112022120 its reverse (212202112121), we get a palindrome (1424314134241).

Subtracting from 1212112022120 its reverse (212202112121), we obtain a palindrome (999909909999).

The spelling of 1212112022120 in words is "one trillion, two hundred twelve billion, one hundred twelve million, twenty-two thousand, one hundred twenty".