211421321211 has 16 divisors (see below), whose sum is σ = 294271847424. Its totient is φ = 134764189824.

The previous prime is 211421321203. The next prime is 211421321263. The reversal of 211421321211 is 112123124112.

It is not a de Polignac number, because 211421321211 - 2³ = 211421321203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211421321311) 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, 457246 + ... + 794931.

It is an arithmetic number, because the mean of its divisors is an integer number (18391990464).

Almost surely, 2^211421321211 is an apocalyptic number.

211421321211 is a deficient number, since it is larger than the sum of its proper divisors (82850526213).

211421321211 is a wasteful number, since it uses less digits than its factorization.

211421321211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254650.

The product of its digits is 192, while the sum is 21.

Adding to 211421321211 its reverse (112123124112), we get a palindrome (323544445323).

The spelling of 211421321211 in words is "two hundred eleven billion, four hundred twenty-one million, three hundred twenty-one thousand, two hundred eleven".