2101210102 has 8 divisors (see below), whose sum is σ = 3152066112. Its totient is φ = 1050521400.

The previous prime is 2101210099. The next prime is 2101210121. The reversal of 2101210102 is 2010121012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3349 + ... + 64912.

It is an arithmetic number, because the mean of its divisors is an integer number (394008264).

Almost surely, 2^2101210102 is an apocalyptic number.

2101210102 is a deficient number, since it is larger than the sum of its proper divisors (1050856010).

2101210102 is a wasteful number, since it uses less digits than its factorization.

2101210102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83654.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2101210102 is about 45838.9583433132. The cubic root of 2101210102 is about 1280.8250909956.

Adding to 2101210102 its reverse (2010121012), we get a palindrome (4111331114).

It can be divided in two parts, 210121010 and 2, that added together give a palindrome (210121012).

The spelling of 2101210102 in words is "two billion, one hundred one million, two hundred ten thousand, one hundred two".