210021201221211 has 8 divisors (see below), whose sum is σ = 311142520327760. Its totient is φ = 140014134147456.

The previous prime is 210021201221197. The next prime is 210021201221267. The reversal of 210021201221211 is 112122102120012.

210021201221211 is a `hidden beast` number, since 2 + 10 + 0 + 21 + 201 + 221 + 211 = 666.

It is not a de Polignac number, because 210021201221211 - 2¹⁵ = 210021201188443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210021201221291) 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, 3889281504070 + ... + 3889281504123.

It is an arithmetic number, because the mean of its divisors is an integer number (38892815040970).

Almost surely, 2^{210021201221211} is an apocalyptic number.

210021201221211 is a deficient number, since it is larger than the sum of its proper divisors (101121319106549).

210021201221211 is an equidigital number, since it uses as much as digits as its factorization.

210021201221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7778563008202 (or 7778563008196 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 210021201221211 its reverse (112122102120012), we get a palindrome (322143303341223).

The spelling of 210021201221211 in words is "two hundred ten trillion, twenty-one billion, two hundred one million, two hundred twenty-one thousand, two hundred eleven".