1210112100 has 54 divisors (see below), whose sum is σ = 3793031970. Its totient is φ = 322696320.

The previous prime is 1210112093. The next prime is 1210112117. The reversal of 1210112100 is 12110121.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 15303744 + 1194808356 = 3912^2 + 34566^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 671385 + ... + 673184.

Almost surely, 2^1210112100 is an apocalyptic number.

1210112100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210112100 is an abundant number, since it is smaller than the sum of its proper divisors (2582919870).

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

1210112100 is a wasteful number, since it uses less digits than its factorization.

1210112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344589 (or 1344579 counting only the distinct ones).

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

The square root of 1210112100 is about 34786.6655487415. The cubic root of 1210112100 is about 1065.6351431914.

Adding to 1210112100 its reverse (12110121), we get a palindrome (1222222221).

The spelling of 1210112100 in words is "one billion, two hundred ten million, one hundred twelve thousand, one hundred".