210211012221 has 16 divisors (see below), whose sum is σ = 334248566784. Its totient is φ = 114897944304.

The previous prime is 210211012201. The next prime is 210211012247. The reversal of 210211012221 is 122210112012.

It is not a de Polignac number, because 210211012221 - 2¹¹ = 210211010173 is a prime.

It is a super-2 number, since 2×210211012221² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 210211012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210211012201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217609261 + ... + 217610226.

It is an arithmetic number, because the mean of its divisors is an integer number (20890535424).

Almost surely, 2^210211012221 is an apocalyptic number.

210211012221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

210211012221 is a deficient number, since it is larger than the sum of its proper divisors (124037554563).

210211012221 is a wasteful number, since it uses less digits than its factorization.

210211012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435219520.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210211012221 its reverse (122210112012), we get a palindrome (332421124233).

The spelling of 210211012221 in words is "two hundred ten billion, two hundred eleven million, twelve thousand, two hundred twenty-one".