11243123401 has 2 divisors, whose sum is σ = 11243123402. Its totient is φ = 11243123400.

The previous prime is 11243123399. The next prime is 11243123413. The reversal of 11243123401 is 10432134211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11119913401 + 123210000 = 105451^2 + 11100^2 .

It is an emirp because it is prime and its reverse (10432134211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11243123401 - 2¹ = 11243123399 is a prime.

It is a super-2 number, since 2×11243123401² (a number of 21 digits) contains 22 as substring.

Together with 11243123399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11243123701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5621561700 + 5621561701.

It is an arithmetic number, because the mean of its divisors is an integer number (5621561701).

Almost surely, 2^11243123401 is an apocalyptic number.

It is an amenable number.

11243123401 is a deficient number, since it is larger than the sum of its proper divisors (1).

11243123401 is an equidigital number, since it uses as much as digits as its factorization.

11243123401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 11243123401 its reverse (10432134211), we get a palindrome (21675257612).

The spelling of 11243123401 in words is "eleven billion, two hundred forty-three million, one hundred twenty-three thousand, four hundred one".