112121212021 has 64 divisors (see below), whose sum is σ = 154336444416. Its totient is φ = 78919142400.

The previous prime is 112121212013. The next prime is 112121212031. The reversal of 112121212021 is 120212121211.

It is not a de Polignac number, because 112121212021 - 2³ = 112121212013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 112121211986 and 112121212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112121212031) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2034966 + ... + 2089336.

It is an arithmetic number, because the mean of its divisors is an integer number (2411506944).

Almost surely, 2^112121212021 is an apocalyptic number.

It is an amenable number.

112121212021 is a deficient number, since it is larger than the sum of its proper divisors (42215232395).

112121212021 is a wasteful number, since it uses less digits than its factorization.

112121212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54482.

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

Adding to 112121212021 its reverse (120212121211), we get a palindrome (232333333232).

The spelling of 112121212021 in words is "one hundred twelve billion, one hundred twenty-one million, two hundred twelve thousand, twenty-one".