212021112121 has 16 divisors (see below), whose sum is σ = 260989344000. Its totient is φ = 167727071808.

The previous prime is 212021112109. The next prime is 212021112133. The reversal of 212021112121 is 121211120212.

It is an interprime number because it is at equal distance from previous prime (212021112109) and next prime (212021112133).

It is a cyclic number.

It is not a de Polignac number, because 212021112121 - 2⁷ = 212021111993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212021112095 and 212021112104.

It is not an unprimeable number, because it can be changed into a prime (212021116121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 423975 + ... + 777043.

It is an arithmetic number, because the mean of its divisors is an integer number (16311834000).

Almost surely, 2^212021112121 is an apocalyptic number.

It is an amenable number.

212021112121 is a deficient number, since it is larger than the sum of its proper divisors (48968231879).

212021112121 is a wasteful number, since it uses less digits than its factorization.

212021112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359688.

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

Adding to 212021112121 its reverse (121211120212), we get a palindrome (333232232333).

The spelling of 212021112121 in words is "two hundred twelve billion, twenty-one million, one hundred twelve thousand, one hundred twenty-one".