11821796101 has 4 divisors (see below), whose sum is σ = 11822466604. Its totient is φ = 11821125600.

The previous prime is 11821796087. The next prime is 11821796117. The reversal of 11821796101 is 10169712811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10169712811 = 37 ⋅274857103.

It can be written as a sum of positive squares in 2 ways, for example, as 8569945476 + 3251850625 = 92574^2 + 57025^2 .

It is a cyclic number.

It is not a de Polignac number, because 11821796101 - 2⁵ = 11821796069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11821796501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308070 + ... + 344311.

It is an arithmetic number, because the mean of its divisors is an integer number (2955616651).

Almost surely, 2^11821796101 is an apocalyptic number.

It is an amenable number.

11821796101 is a deficient number, since it is larger than the sum of its proper divisors (670503).

11821796101 is an equidigital number, since it uses as much as digits as its factorization.

11821796101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670502.

The product of its (nonzero) digits is 6048, while the sum is 37.

The spelling of 11821796101 in words is "eleven billion, eight hundred twenty-one million, seven hundred ninety-six thousand, one hundred one".