210212111110221 has 64 divisors (see below), whose sum is σ = 343273042851840. Its totient is φ = 126078653272320.

The previous prime is 210212111110219. The next prime is 210212111110247. The reversal of 210212111110221 is 122011111212012.

It is a happy number.

210212111110221 is a `hidden beast` number, since 2 + 10 + 212 + 111 + 110 + 221 = 666.

It is not a de Polignac number, because 210212111110221 - 2¹ = 210212111110219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210212111110194 and 210212111110203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210212111110721) 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, 16873486 + ... + 26554448.

It is an arithmetic number, because the mean of its divisors is an integer number (5363641294560).

Almost surely, 2^{210212111110221} is an apocalyptic number.

It is an amenable number.

210212111110221 is a deficient number, since it is larger than the sum of its proper divisors (133060931741619).

210212111110221 is a wasteful number, since it uses less digits than its factorization.

210212111110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9681743 (or 9681737 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 210212111110221 its reverse (122011111212012), we get a palindrome (332223222322233).

The spelling of 210212111110221 in words is "two hundred ten trillion, two hundred twelve billion, one hundred eleven million, one hundred ten thousand, two hundred twenty-one".