210000120111 has 24 divisors (see below), whose sum is σ = 303930624816. Its totient is φ = 139724674560.

The previous prime is 210000120103. The next prime is 210000120133. The reversal of 210000120111 is 111021000012.

It is a happy number.

It is not a de Polignac number, because 210000120111 - 2³ = 210000120103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 210000120093 and 210000120102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210000124111) 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, 17592301 + ... + 17604233.

It is an arithmetic number, because the mean of its divisors is an integer number (12663776034).

Almost surely, 2^210000120111 is an apocalyptic number.

210000120111 is a deficient number, since it is larger than the sum of its proper divisors (93930504705).

210000120111 is a wasteful number, since it uses less digits than its factorization.

210000120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15623 (or 15620 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 210000120111 its reverse (111021000012), we get a palindrome (321021120123).

The spelling of 210000120111 in words is "two hundred ten billion, one hundred twenty thousand, one hundred eleven".