811630921101 has 168 divisors, whose sum is σ = 1492613874144. Its totient is φ = 388879021440.

The previous prime is 811630921093. The next prime is 811630921133. The reversal of 811630921101 is 101129036118.

It is not a de Polignac number, because 811630921101 - 2³ = 811630921093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811630921201) by changing a digit.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 656127855 + ... + 656129091.

Almost surely, 2^811630921101 is an apocalyptic number.

It is an amenable number.

811630921101 is a deficient number, since it is larger than the sum of its proper divisors (680982953043).

811630921101 is an equidigital number, since it uses as much as digits as its factorization.

811630921101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319 (or 1271 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 33.

Adding to 811630921101 its reverse (101129036118), we get a palindrome (912759957219).

The spelling of 811630921101 in words is "eight hundred eleven billion, six hundred thirty million, nine hundred twenty-one thousand, one hundred one".