212021020020121 has 8 divisors (see below), whose sum is σ = 233188421364864. Its totient is φ = 191547631834320.

The previous prime is 212021020020001. The next prime is 212021020020127. The reversal of 212021020020121 is 121020020120212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212021020020121 - 2¹⁵ = 212021019987353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212021020020095 and 212021020020104.

It is not an unprimeable number, because it can be changed into a prime (212021020020127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173503289095 + ... + 173503290316.

It is an arithmetic number, because the mean of its divisors is an integer number (29148552670608).

Almost surely, 2^{212021020020121} is an apocalyptic number.

It is an amenable number.

212021020020121 is a deficient number, since it is larger than the sum of its proper divisors (21167401344743).

212021020020121 is a wasteful number, since it uses less digits than its factorization.

212021020020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347006579471.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212021020020121 its reverse (121020020120212), we get a palindrome (333041040140333).

The spelling of 212021020020121 in words is "two hundred twelve trillion, twenty-one billion, twenty million, twenty thousand, one hundred twenty-one".