211231332221101 has 4 divisors (see below), whose sum is σ = 211231601966592. Its totient is φ = 211231062475612.

The previous prime is 211231332221099. The next prime is 211231332221131. The reversal of 211231332221101 is 101122233132112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211231332221101 - 2¹ = 211231332221099 is a prime.

It is a super-2 number, since 2×211231332221101² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211231332221131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133694701 + ... + 135265426.

It is an arithmetic number, because the mean of its divisors is an integer number (52807900491648).

Almost surely, 2^{211231332221101} is an apocalyptic number.

It is an amenable number.

211231332221101 is a deficient number, since it is larger than the sum of its proper divisors (269745491).

211231332221101 is an equidigital number, since it uses as much as digits as its factorization.

211231332221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269745490.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 211231332221101 its reverse (101122233132112), we get a palindrome (312353565353213).

The spelling of 211231332221101 in words is "two hundred eleven trillion, two hundred thirty-one billion, three hundred thirty-two million, two hundred twenty-one thousand, one hundred one".