210211001012221 has 12 divisors (see below), whose sum is σ = 231058725503200. Its totient is φ = 191100618478440.

The previous prime is 210211001012213. The next prime is 210211001012267. The reversal of 210211001012221 is 122210100112012.

It is not a de Polignac number, because 210211001012221 - 2³ = 210211001012213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210211001012195 and 210211001012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210211001012521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143048320 + ... + 144510358.

Almost surely, 2^{210211001012221} is an apocalyptic number.

It is an amenable number.

210211001012221 is a deficient number, since it is larger than the sum of its proper divisors (20847724490979).

210211001012221 is a wasteful number, since it uses less digits than its factorization.

210211001012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2650320 (or 2650309 counting only the distinct ones).

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

Adding to 210211001012221 its reverse (122210100112012), we get a palindrome (332421101124233).

The spelling of 210211001012221 in words is "two hundred ten trillion, two hundred eleven billion, one million, twelve thousand, two hundred twenty-one".