11201111101021 has 4 divisors (see below), whose sum is σ = 11268183622752. Its totient is φ = 11134038579292.

The previous prime is 11201111101013. The next prime is 11201111101031. The reversal of 11201111101021 is 12010111110211.

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 11201111101021 - 2³ = 11201111101013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11201111100992 and 11201111101010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201111101031) 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, 33536260615 + ... + 33536260948.

It is an arithmetic number, because the mean of its divisors is an integer number (2817045905688).

Almost surely, 2^{11201111101021} is an apocalyptic number.

It is an amenable number.

11201111101021 is a deficient number, since it is larger than the sum of its proper divisors (67072521731).

11201111101021 is an equidigital number, since it uses as much as digits as its factorization.

11201111101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67072521730.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 11201111101021 its reverse (12010111110211), we get a palindrome (23211222211232).

The spelling of 11201111101021 in words is "eleven trillion, two hundred one billion, one hundred eleven million, one hundred one thousand, twenty-one".