210120012321111 has 24 divisors (see below), whose sum is σ = 307844886495744. Its totient is φ = 138091811981760.

The previous prime is 210120012321071. The next prime is 210120012321143. The reversal of 210120012321111 is 111123210021012.

It is a happy number.

210120012321111 is a `hidden beast` number, since 21 + 0 + 1 + 200 + 12 + 321 + 111 = 666.

It is not a de Polignac number, because 210120012321111 - 2¹⁹ = 210120011796823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210120012326111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 585272880 + ... + 585631781.

It is an arithmetic number, because the mean of its divisors is an integer number (12826870270656).

Almost surely, 2^{210120012321111} is an apocalyptic number.

210120012321111 is a deficient number, since it is larger than the sum of its proper divisors (97724874174633).

210120012321111 is a wasteful number, since it uses less digits than its factorization.

210120012321111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170904951 (or 1170904948 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 210120012321111 its reverse (111123210021012), we get a palindrome (321243222342123).

The spelling of 210120012321111 in words is "two hundred ten trillion, one hundred twenty billion, twelve million, three hundred twenty-one thousand, one hundred eleven".