1211100130320 has 80 divisors (see below), whose sum is σ = 3755764437120. Its totient is φ = 322843558912.

The previous prime is 1211100130291. The next prime is 1211100130351. The reversal of 1211100130320 is 230310011121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1211100130320² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1211100130320.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242100 + ... + 1575059.

It is an arithmetic number, because the mean of its divisors is an integer number (46947055464).

Almost surely, 2^{1211100130320} is an apocalyptic number.

1211100130320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211100130320 is an abundant number, since it is smaller than the sum of its proper divisors (2544664306800).

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

1211100130320 is a wasteful number, since it uses less digits than its factorization.

1211100130320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819952 (or 1819946 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1211100130320 its reverse (230310011121), we get a palindrome (1441410141441).

The spelling of 1211100130320 in words is "one trillion, two hundred eleven billion, one hundred million, one hundred thirty thousand, three hundred twenty".