102130100 has 18 divisors (see below), whose sum is σ = 221622534. Its totient is φ = 40852000.

The previous prime is 102130087. The next prime is 102130103. The reversal of 102130100 is 1031201.

It can be written as a sum of positive squares in 3 ways, for example, as 16826404 + 85303696 = 4102^2 + 9236^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102130103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 510551 + ... + 510750.

It is an arithmetic number, because the mean of its divisors is an integer number (12312363).

Almost surely, 2^102130100 is an apocalyptic number.

102130100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102130100 is an abundant number, since it is smaller than the sum of its proper divisors (119492434).

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

102130100 is a wasteful number, since it uses less digits than its factorization.

102130100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021315 (or 1021308 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 102130100 is about 10105.9437956086. The cubic root of 102130100 is about 467.4314387527.

Adding to 102130100 its reverse (1031201), we get a palindrome (103161301).

The spelling of 102130100 in words is "one hundred two million, one hundred thirty thousand, one hundred".