210021111200221 has 8 divisors (see below), whose sum is σ = 210053026363104. Its totient is φ = 209989196897040.

The previous prime is 210021111200111. The next prime is 210021111200249. The reversal of 210021111200221 is 122002111120012.

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 210021111200221 - 2⁹ = 210021111199709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210021111200195 and 210021111200204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021111200291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 623045095 + ... + 623382091.

It is an arithmetic number, because the mean of its divisors is an integer number (26256628295388).

Almost surely, 2^{210021111200221} is an apocalyptic number.

It is an amenable number.

210021111200221 is a deficient number, since it is larger than the sum of its proper divisors (31915162883).

210021111200221 is an equidigital number, since it uses as much as digits as its factorization.

210021111200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429851.

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

Adding to 210021111200221 its reverse (122002111120012), we get a palindrome (332023222320233).

The spelling of 210021111200221 in words is "two hundred ten trillion, twenty-one billion, one hundred eleven million, two hundred thousand, two hundred twenty-one".