2121122210112 has 84 divisors (see below), whose sum is σ = 6304992171296. Its totient is φ = 707040731520.

The previous prime is 2121122210111. The next prime is 2121122210117. The reversal of 2121122210112 is 2110122211212.

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 (2121122210111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68178964 + ... + 68210067.

Almost surely, 2^{2121122210112} is an apocalyptic number.

It is an amenable number.

2121122210112 is an abundant number, since it is smaller than the sum of its proper divisors (4183869961184).

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

2121122210112 is an equidigital number, since it uses as much as digits as its factorization.

2121122210112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136389058 (or 136389036 counting only the distinct ones).

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

Adding to 2121122210112 its reverse (2110122211212), we get a palindrome (4231244421324).

The spelling of 2121122210112 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred ten thousand, one hundred twelve".