1211100132 has 72 divisors (see below), whose sum is σ = 3190246528. Its totient is φ = 357065280.

The previous prime is 1211100131. The next prime is 1211100133. The reversal of 1211100132 is 2310011121.

It is an interprime number because it is at equal distance from previous prime (1211100131) and next prime (1211100133).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211100131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42453 + ... + 64995.

Almost surely, 2^1211100132 is an apocalyptic number.

1211100132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211100132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1595123264).

1211100132 is an abundant number, since it is smaller than the sum of its proper divisors (1979146396).

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

1211100132 is a wasteful number, since it uses less digits than its factorization.

1211100132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22609 (or 22596 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1211100132 is about 34800.8639547928. The cubic root of 1211100132 is about 1065.9250874590.

Adding to 1211100132 its reverse (2310011121), we get a palindrome (3521111253).

The spelling of 1211100132 in words is "one billion, two hundred eleven million, one hundred thousand, one hundred thirty-two".