11421015540211 has 4 divisors (see below), whose sum is σ = 11450835424512. Its totient is φ = 11391195655912.

The previous prime is 11421015540167. The next prime is 11421015540223. The reversal of 11421015540211 is 11204551012411.

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

It is a cyclic number.

It is not a de Polignac number, because 11421015540211 - 2²⁷ = 11420881322483 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11421015540211.

It is not an unprimeable number, because it can be changed into a prime (11421015540611) 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, 14909941576 + ... + 14909942341.

It is an arithmetic number, because the mean of its divisors is an integer number (2862708856128).

Almost surely, 2^{11421015540211} is an apocalyptic number.

11421015540211 is a deficient number, since it is larger than the sum of its proper divisors (29819884301).

11421015540211 is an equidigital number, since it uses as much as digits as its factorization.

11421015540211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29819884300.

The product of its (nonzero) digits is 1600, while the sum is 28.

Adding to 11421015540211 its reverse (11204551012411), we get a palindrome (22625566552622).

The spelling of 11421015540211 in words is "eleven trillion, four hundred twenty-one billion, fifteen million, five hundred forty thousand, two hundred eleven".