212121012221112 has 128 divisors (see below), whose sum is σ = 534124224440640. Its totient is φ = 70198224445440.

The previous prime is 212121012220937. The next prime is 212121012221117. The reversal of 212121012221112 is 211122210121212.

It is a super-3 number, since 3×212121012221112³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121012221117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41780775918 + ... + 41780780994.

Almost surely, 2^{212121012221112} is an apocalyptic number.

It is an amenable number.

212121012221112 is an abundant number, since it is smaller than the sum of its proper divisors (322003212219528).

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

212121012221112 is a wasteful number, since it uses less digits than its factorization.

212121012221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12281 (or 12277 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 212121012221112 its reverse (211122210121212), we get a palindrome (423243222342324).

The spelling of 212121012221112 in words is "two hundred twelve trillion, one hundred twenty-one billion, twelve million, two hundred twenty-one thousand, one hundred twelve".