21113100414401 has 4 divisors (see below), whose sum is σ = 21113110222932. Its totient is φ = 21113090605872.

The previous prime is 21113100414359. The next prime is 21113100414407. The reversal of 21113100414401 is 10441400131112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6820579917376 + 14292520497025 = 2611624^2 + 3780545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21113100414401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21113100414407) 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, 119270 + ... + 6499263.

It is an arithmetic number, because the mean of its divisors is an integer number (5278277555733).

Almost surely, 2^{21113100414401} is an apocalyptic number.

It is an amenable number.

21113100414401 is a deficient number, since it is larger than the sum of its proper divisors (9808531).

21113100414401 is an equidigital number, since it uses as much as digits as its factorization.

21113100414401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9808530.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 21113100414401 its reverse (10441400131112), we get a palindrome (31554500545513).

The spelling of 21113100414401 in words is "twenty-one trillion, one hundred thirteen billion, one hundred million, four hundred fourteen thousand, four hundred one".