210133212123 has 4 divisors (see below), whose sum is σ = 280177616168. Its totient is φ = 140088808080.

The previous prime is 210133212097. The next prime is 210133212131. The reversal of 210133212123 is 321212331012.

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

It is not a de Polignac number, because 210133212123 - 2⁶ = 210133212059 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 210133212123.

It is not an unprimeable number, because it can be changed into a prime (210133212143) 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 3 ways as a sum of consecutive naturals, for example, 35022202018 + ... + 35022202023.

It is an arithmetic number, because the mean of its divisors is an integer number (70044404042).

Almost surely, 2^210133212123 is an apocalyptic number.

210133212123 is a deficient number, since it is larger than the sum of its proper divisors (70044404045).

210133212123 is an equidigital number, since it uses as much as digits as its factorization.

210133212123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70044404044.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 210133212123 its reverse (321212331012), we get a palindrome (531345543135).

The spelling of 210133212123 in words is "two hundred ten billion, one hundred thirty-three million, two hundred twelve thousand, one hundred twenty-three".