211321210123 has 12 divisors (see below), whose sum is σ = 233903193048. Its totient is φ = 190243127360.

The previous prime is 211321210117. The next prime is 211321210141. The reversal of 211321210123 is 321012123112.

211321210123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211321210123 - 2⁹ = 211321209611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211321210123.

It is not an unprimeable number, because it can be changed into a prime (211321213123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11740213 + ... + 11758198.

It is an arithmetic number, because the mean of its divisors is an integer number (19491932754).

Almost surely, 2^211321210123 is an apocalyptic number.

211321210123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

211321210123 is a deficient number, since it is larger than the sum of its proper divisors (22581982925).

211321210123 is a wasteful number, since it uses less digits than its factorization.

211321210123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23498474 (or 23498451 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 211321210123 its reverse (321012123112), we get a palindrome (532333333235).

The spelling of 211321210123 in words is "two hundred eleven billion, three hundred twenty-one million, two hundred ten thousand, one hundred twenty-three".