1210100112 has 60 divisors (see below), whose sum is σ = 3647112924. Its totient is φ = 372337920.

The previous prime is 1210100093. The next prime is 1210100119. The reversal of 1210100112 is 2110010121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 518199696 + 691900416 = 22764^2 + 26304^2 .

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 = 1210100094 and 1210100103.

It is not an unprimeable number, because it can be changed into a prime (1210100119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 321339 + ... + 325082.

Almost surely, 2^1210100112 is an apocalyptic number.

1210100112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1210100112 is an abundant number, since it is smaller than the sum of its proper divisors (2437012812).

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

1210100112 is a wasteful number, since it uses less digits than its factorization.

1210100112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646448 (or 646439 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1210100112 is about 34786.4932409118. The cubic root of 1210100112 is about 1065.6316242678.

Adding to 1210100112 its reverse (2110010121), we get a palindrome (3320110233).

The spelling of 1210100112 in words is "one billion, two hundred ten million, one hundred thousand, one hundred twelve".