11421814081 has 2 divisors, whose sum is σ = 11421814082. Its totient is φ = 11421814080.

The previous prime is 11421814039. The next prime is 11421814121. The reversal of 11421814081 is 18041812411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8646210225 + 2775603856 = 92985^2 + 52684^2 .

It is a cyclic number.

It is not a de Polignac number, because 11421814081 - 2²¹ = 11419716929 is a prime.

It is a super-2 number, since 2×11421814081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11421814381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5710907040 + 5710907041.

It is an arithmetic number, because the mean of its divisors is an integer number (5710907041).

Almost surely, 2^11421814081 is an apocalyptic number.

It is an amenable number.

11421814081 is a deficient number, since it is larger than the sum of its proper divisors (1).

11421814081 is an equidigital number, since it uses as much as digits as its factorization.

11421814081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2048, while the sum is 31.

The spelling of 11421814081 in words is "eleven billion, four hundred twenty-one million, eight hundred fourteen thousand, eighty-one".