11421001311 has 4 divisors (see below), whose sum is σ = 15228001752. Its totient is φ = 7614000872.

The previous prime is 11421001297. The next prime is 11421001313. The reversal of 11421001311 is 11310012411.

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 11421001311 - 2¹⁹ = 11420477023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11421001313) 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, 1903500216 + ... + 1903500221.

It is an arithmetic number, because the mean of its divisors is an integer number (3807000438).

Almost surely, 2^11421001311 is an apocalyptic number.

11421001311 is a deficient number, since it is larger than the sum of its proper divisors (3807000441).

11421001311 is an equidigital number, since it uses as much as digits as its factorization.

11421001311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3807000440.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 11421001311 its reverse (11310012411), we get a palindrome (22731013722).

It can be divided in two parts, 1142100 and 1311, that added together give a palindrome (1143411).

The spelling of 11421001311 in words is "eleven billion, four hundred twenty-one million, one thousand, three hundred eleven".