2121212220112 has 40 divisors (see below), whose sum is σ = 4199259551616. Its totient is φ = 1037553490176.

The previous prime is 2121212220107. The next prime is 2121212220133. The reversal of 2121212220112 is 2110222121212.

It is a super-3 number, since 3×2121212220112³ (a number of 38 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2121212220112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 947043 + ... + 2267005.

Almost surely, 2^{2121212220112} is an apocalyptic number.

It is an amenable number.

2121212220112 is a deficient number, since it is larger than the sum of its proper divisors (2078047331504).

2121212220112 is a wasteful number, since it uses less digits than its factorization.

2121212220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322155 (or 1322149 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2121212220112 its reverse (2110222121212), we get a palindrome (4231434341324).

The spelling of 2121212220112 in words is "two trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twenty thousand, one hundred twelve".