102120210 has 32 divisors (see below), whose sum is σ = 272321280. Its totient is φ = 27231984.

The previous prime is 102120203. The next prime is 102120301. The reversal of 102120210 is 12021201.

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 = 102120192 and 102120201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188842 + ... + 189381.

It is an arithmetic number, because the mean of its divisors is an integer number (8510040).

Almost surely, 2^102120210 is an apocalyptic number.

102120210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102120210 is an abundant number, since it is smaller than the sum of its proper divisors (170201070).

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

102120210 is a wasteful number, since it uses less digits than its factorization.

102120210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378239 (or 378233 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 102120210 is about 10105.4544677615. The cubic root of 102120210 is about 467.4163500042.

Adding to 102120210 its reverse (12021201), we get a palindrome (114141411).

Subtracting from 102120210 its reverse (12021201), we obtain a palindrome (90099009).

The spelling of 102120210 in words is "one hundred two million, one hundred twenty thousand, two hundred ten".