1210000100 has 36 divisors (see below), whose sum is σ = 2739866304. Its totient is φ = 462955680.

The previous prime is 1210000081. The next prime is 1210000111. The reversal of 1210000100 is 10000121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 260744 + ... + 265343.

Almost surely, 2^1210000100 is an apocalyptic number.

1210000100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210000100 is an abundant number, since it is smaller than the sum of its proper divisors (1529866204).

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

1210000100 is a wasteful number, since it uses less digits than its factorization.

1210000100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526124 (or 526117 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 1210000100 is about 34785.0556992511. The cubic root of 1210000100 is about 1065.6022661220.

Adding to 1210000100 its reverse (10000121), we get a palindrome (1220000221).

The spelling of 1210000100 in words is "one billion, two hundred ten million, one hundred", and thus it is an aban number.