1212021120112 has 60 divisors (see below), whose sum is σ = 2670185581560. Its totient is φ = 531921470080.

The previous prime is 1212021120109. The next prime is 1212021120133. The reversal of 1212021120112 is 2110211202121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10737718 + ... + 10850005.

It is an arithmetic number, because the mean of its divisors is an integer number (44503093026).

Almost surely, 2^{1212021120112} is an apocalyptic number.

It is an amenable number.

1212021120112 is an abundant number, since it is smaller than the sum of its proper divisors (1458164461448).

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

1212021120112 is a wasteful number, since it uses less digits than its factorization.

1212021120112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21587782 (or 21587765 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1212021120112 its reverse (2110211202121), we get a palindrome (3322232322233).

The spelling of 1212021120112 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred twenty thousand, one hundred twelve".