210120105 has 16 divisors (see below), whose sum is σ = 362053440. Its totient is φ = 103443648.

The previous prime is 210120101. The next prime is 210120133. The reversal of 210120105 is 501021012.

It is not a de Polignac number, because 210120105 - 2² = 210120101 is a prime.

It is a super-2 number, since 2×210120105² = 88300917050422050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (210120101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 538575 + ... + 538964.

It is an arithmetic number, because the mean of its divisors is an integer number (22628340).

Almost surely, 2^210120105 is an apocalyptic number.

It is an amenable number.

210120105 is a deficient number, since it is larger than the sum of its proper divisors (151933335).

210120105 is a wasteful number, since it uses less digits than its factorization.

210120105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077560.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 210120105 is about 14495.5201700387. The cubic root of 210120105 is about 594.5054903065.

Adding to 210120105 its reverse (501021012), we get a palindrome (711141117).

The spelling of 210120105 in words is "two hundred ten million, one hundred twenty thousand, one hundred five".