211210210221011 has 4 divisors (see below), whose sum is σ = 216122075575032. Its totient is φ = 206298344866992.

The previous prime is 211210210220981. The next prime is 211210210221053. The reversal of 211210210221011 is 110122012012112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211210210221011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211210210221071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2455932676946 + ... + 2455932677031.

It is an arithmetic number, because the mean of its divisors is an integer number (54030518893758).

Almost surely, 2^{211210210221011} is an apocalyptic number.

211210210221011 is a deficient number, since it is larger than the sum of its proper divisors (4911865354021).

211210210221011 is an equidigital number, since it uses as much as digits as its factorization.

211210210221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4911865354020.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 211210210221011 its reverse (110122012012112), we get a palindrome (321332222233123).

The spelling of 211210210221011 in words is "two hundred eleven trillion, two hundred ten billion, two hundred ten million, two hundred twenty-one thousand, eleven".