210202111221221 has 8 divisors (see below), whose sum is σ = 240233594012160. Its totient is φ = 180171280870128.

The previous prime is 210202111221199. The next prime is 210202111221227. The reversal of 210202111221221 is 122122111202012.

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 210202111221221 - 2¹⁸ = 210202110959077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210202111221193 and 210202111221202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210202111221227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162419381 + ... + 163708458.

It is an arithmetic number, because the mean of its divisors is an integer number (30029199251520).

Almost surely, 2^{210202111221221} is an apocalyptic number.

It is an amenable number.

210202111221221 is a deficient number, since it is larger than the sum of its proper divisors (30031482790939).

210202111221221 is an equidigital number, since it uses as much as digits as its factorization.

210202111221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326219923.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 210202111221221 its reverse (122122111202012), we get a palindrome (332324222423233).

The spelling of 210202111221221 in words is "two hundred ten trillion, two hundred two billion, one hundred eleven million, two hundred twenty-one thousand, two hundred twenty-one".