21114140401 has 2 divisors, whose sum is σ = 21114140402. Its totient is φ = 21114140400.

The previous prime is 21114140297. The next prime is 21114140423. The reversal of 21114140401 is 10404141112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18318269025 + 2795871376 = 135345^2 + 52876^2 .

It is a cyclic number.

It is not a de Polignac number, because 21114140401 - 2²⁵ = 21080585969 is a prime.

It is not a weakly prime, because it can be changed into another prime (21114140441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10557070200 + 10557070201.

It is an arithmetic number, because the mean of its divisors is an integer number (10557070201).

Almost surely, 2^21114140401 is an apocalyptic number.

It is an amenable number.

21114140401 is a deficient number, since it is larger than the sum of its proper divisors (1).

21114140401 is an equidigital number, since it uses as much as digits as its factorization.

21114140401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21114140401 its reverse (10404141112), we get a palindrome (31518281513).

The spelling of 21114140401 in words is "twenty-one billion, one hundred fourteen million, one hundred forty thousand, four hundred one".