210121011323 has 12 divisors (see below), whose sum is σ = 216326466720. Its totient is φ = 204059962080.

The previous prime is 210121011311. The next prime is 210121011329. The reversal of 210121011323 is 323110121012.

It is not a de Polignac number, because 210121011323 - 2⁶ = 210121011259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210121011329) 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 11 ways as a sum of consecutive naturals, for example, 63440 + ... + 651357.

It is an arithmetic number, because the mean of its divisors is an integer number (18027205560).

Almost surely, 2^210121011323 is an apocalyptic number.

210121011323 is a deficient number, since it is larger than the sum of its proper divisors (6205455397).

210121011323 is an frugal number, since it uses more digits than its factorization.

210121011323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714998 (or 714937 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 210121011323 its reverse (323110121012), we get a palindrome (533231132335).

The spelling of 210121011323 in words is "two hundred ten billion, one hundred twenty-one million, eleven thousand, three hundred twenty-three".