21311123111301 has 4 divisors (see below), whose sum is σ = 28414830815072. Its totient is φ = 14207415407532.

The previous prime is 21311123111233. The next prime is 21311123111309. The reversal of 21311123111301 is 10311132111312.

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 de Polignac number, because none of the positive numbers 2^k-21311123111301 is a prime.

It is a super-2 number, since 2×21311123111301² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21311123111309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3551853851881 + ... + 3551853851886.

It is an arithmetic number, because the mean of its divisors is an integer number (7103707703768).

Almost surely, 2^{21311123111301} is an apocalyptic number.

It is an amenable number.

21311123111301 is a deficient number, since it is larger than the sum of its proper divisors (7103707703771).

21311123111301 is an equidigital number, since it uses as much as digits as its factorization.

21311123111301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7103707703770.

The product of its (nonzero) digits is 108, while the sum is 21.

Adding to 21311123111301 its reverse (10311132111312), we get a palindrome (31622255222613).

The spelling of 21311123111301 in words is "twenty-one trillion, three hundred eleven billion, one hundred twenty-three million, one hundred eleven thousand, three hundred one".