211210222100221 has 32 divisors (see below), whose sum is σ = 226578381120000. Its totient is φ = 196301697196608.

The previous prime is 211210222100177. The next prime is 211210222100231. The reversal of 211210222100221 is 122001222012112.

It is a cyclic number.

It is not a de Polignac number, because 211210222100221 - 2³¹ = 211208074616573 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211210222100231) 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 31 ways as a sum of consecutive naturals, for example, 855883270 + ... + 856130008.

It is an arithmetic number, because the mean of its divisors is an integer number (7080574410000).

Almost surely, 2^{211210222100221} is an apocalyptic number.

It is an amenable number.

211210222100221 is a deficient number, since it is larger than the sum of its proper divisors (15368159019779).

211210222100221 is a wasteful number, since it uses less digits than its factorization.

211210222100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250633.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 211210222100221 its reverse (122001222012112), we get a palindrome (333211444112333).

The spelling of 211210222100221 in words is "two hundred eleven trillion, two hundred ten billion, two hundred twenty-two million, one hundred thousand, two hundred twenty-one".