11201000120021 has 4 divisors (see below), whose sum is σ = 11587241503500. Its totient is φ = 10814758736544.

The previous prime is 11201000120003. The next prime is 11201000120069. The reversal of 11201000120021 is 12002100010211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3756347896900 + 7444652223121 = 1938130^2 + 2728489^2 .

It is a cyclic number.

It is not a de Polignac number, because 11201000120021 - 2¹⁴ = 11201000103637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11201000119984 and 11201000120011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201000120521) 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, 193120691696 + ... + 193120691753.

It is an arithmetic number, because the mean of its divisors is an integer number (2896810375875).

Almost surely, 2^{11201000120021} is an apocalyptic number.

It is an amenable number.

11201000120021 is a deficient number, since it is larger than the sum of its proper divisors (386241383479).

11201000120021 is an equidigital number, since it uses as much as digits as its factorization.

11201000120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386241383478.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11201000120021 its reverse (12002100010211), we get a palindrome (23203100130232).

The spelling of 11201000120021 in words is "eleven trillion, two hundred one billion, one hundred twenty thousand, twenty-one".