1210100100 has 72 divisors (see below), whose sum is σ = 3819526368. Its totient is φ = 293356800.

The previous prime is 1210100093. The next prime is 1210100119. The reversal of 1210100100 is 10010121.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180049 + ... + 186648.

Almost surely, 2^1210100100 is an apocalyptic number.

1210100100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210100100 is an abundant number, since it is smaller than the sum of its proper divisors (2609426268).

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

1210100100 is a wasteful number, since it uses less digits than its factorization.

1210100100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366725 (or 366718 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 1210100100 is about 34786.4930684310. The cubic root of 1210100100 is about 1065.6316207453.

Adding to 1210100100 its reverse (10010121), we get a palindrome (1220110221).

The spelling of 1210100100 in words is "one billion, two hundred ten million, one hundred thousand, one hundred".