210102120642 has 64 divisors (see below), whose sum is σ = 436626837504. Its totient is φ = 67359102720.

The previous prime is 210102120637. The next prime is 210102120667. The reversal of 210102120642 is 246021201012.

210102120642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3777418 + ... + 3832634.

It is an arithmetic number, because the mean of its divisors is an integer number (6822294336).

Almost surely, 2^210102120642 is an apocalyptic number.

210102120642 is an abundant number, since it is smaller than the sum of its proper divisors (226524716862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210102120642 is a wasteful number, since it uses less digits than its factorization.

210102120642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55503.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 210102120642 its reverse (246021201012), we get a palindrome (456123321654).

The spelling of 210102120642 in words is "two hundred ten billion, one hundred two million, one hundred twenty thousand, six hundred forty-two".