1210200100 has 18 divisors (see below), whose sum is σ = 2626134434. Its totient is φ = 484080000.

The previous prime is 1210200053. The next prime is 1210200109. The reversal of 1210200100 is 10020121.

It can be written as a sum of positive squares in 3 ways, for example, as 244109376 + 966090724 = 15624^2 + 31082^2 .

It is not an unprimeable number, because it can be changed into a prime (1210200109) 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, 6050901 + ... + 6051100.

Almost surely, 2^1210200100 is an apocalyptic number.

1210200100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210200100 is an abundant number, since it is smaller than the sum of its proper divisors (1415934334).

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

1210200100 is a wasteful number, since it uses less digits than its factorization.

1210200100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12102015 (or 12102008 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1210200100 is about 34787.9303782217. The cubic root of 1210200100 is about 1065.6609737514.

Adding to 1210200100 its reverse (10020121), we get a palindrome (1220220221).

The spelling of 1210200100 in words is "one billion, two hundred ten million, two hundred thousand, one hundred".