211021200202121 has 8 divisors (see below), whose sum is σ = 217828645529088. Its totient is φ = 204213774240000.

The previous prime is 211021200202091. The next prime is 211021200202123. The reversal of 211021200202121 is 121202002120112.

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 211021200202121 - 2³⁸ = 210746322295177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211021200202121.

It is not an unprimeable number, because it can be changed into a prime (211021200202123) 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, 19199636 + ... + 28118826.

It is an arithmetic number, because the mean of its divisors is an integer number (27228580691136).

Almost surely, 2^{211021200202121} is an apocalyptic number.

It is an amenable number.

211021200202121 is a deficient number, since it is larger than the sum of its proper divisors (6807445326967).

211021200202121 is an equidigital number, since it uses as much as digits as its factorization.

211021200202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9682423.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211021200202121 its reverse (121202002120112), we get a palindrome (332223202322233).

The spelling of 211021200202121 in words is "two hundred eleven trillion, twenty-one billion, two hundred million, two hundred two thousand, one hundred twenty-one".