11901779810213 has 4 divisors (see below), whose sum is σ = 11934209728320. Its totient is φ = 11869349892108.

The previous prime is 11901779810191. The next prime is 11901779810227. The reversal of 11901779810213 is 31201897710911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11901779810213 - 2³² = 11897484842917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11901779510213) 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, 16214958503 + ... + 16214959236.

It is an arithmetic number, because the mean of its divisors is an integer number (2983552432080).

Almost surely, 2^{11901779810213} is an apocalyptic number.

It is an amenable number.

11901779810213 is a deficient number, since it is larger than the sum of its proper divisors (32429918107).

11901779810213 is an equidigital number, since it uses as much as digits as its factorization.

11901779810213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32429918106.

The product of its (nonzero) digits is 190512, while the sum is 50.

The spelling of 11901779810213 in words is "eleven trillion, nine hundred one billion, seven hundred seventy-nine million, eight hundred ten thousand, two hundred thirteen".