2121222220112 has 30 divisors (see below), whose sum is σ = 4172125048938. Its totient is φ = 1044781058112.

The previous prime is 2121222220069. The next prime is 2121222220129. The reversal of 2121222220112 is 2110222221212.

It can be written as a sum of positive squares in only one way, i.e., 1873273992976 + 247948227136 = 1368676^2 + 497944^2 .

It is a super-3 number, since 3×2121222220112³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14694983 + ... + 14838630.

Almost surely, 2^{2121222220112} is an apocalyptic number.

It is an amenable number.

2121222220112 is a deficient number, since it is larger than the sum of its proper divisors (2050902828826).

2121222220112 is an equidigital number, since it uses as much as digits as its factorization.

2121222220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29533755 (or 29533682 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2121222220112 its reverse (2110222221212), we get a palindrome (4231444441324).

The spelling of 2121222220112 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-two million, two hundred twenty thousand, one hundred twelve".