210120100111 has 16 divisors (see below), whose sum is σ = 215418621600. Its totient is φ = 204885417600.

The previous prime is 210120100109. The next prime is 210120100117. The reversal of 210120100111 is 111001021012.

It is a cyclic number.

It is not a de Polignac number, because 210120100111 - 2¹ = 210120100109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210120100117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4128841 + ... + 4179421.

It is an arithmetic number, because the mean of its divisors is an integer number (13463663850).

Almost surely, 2^210120100111 is an apocalyptic number.

210120100111 is a deficient number, since it is larger than the sum of its proper divisors (5298521489).

210120100111 is a wasteful number, since it uses less digits than its factorization.

210120100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51210.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 210120100111 its reverse (111001021012), we get a palindrome (321121121123).

The spelling of 210120100111 in words is "two hundred ten billion, one hundred twenty million, one hundred thousand, one hundred eleven".