21104140401 has 24 divisors (see below), whose sum is σ = 31611652800. Its totient is φ = 13556245536.

The previous prime is 21104140381. The next prime is 21104140411. The reversal of 21104140401 is 10404140112.

21104140401 is a `hidden beast` number, since 21 + 104 + 140 + 401 = 666.

It is not a de Polignac number, because 21104140401 - 2¹⁴ = 21104124017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21104140411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 273351 + ... + 341948.

It is an arithmetic number, because the mean of its divisors is an integer number (1317152200).

Almost surely, 2^21104140401 is an apocalyptic number.

It is an amenable number.

21104140401 is a deficient number, since it is larger than the sum of its proper divisors (10507512399).

21104140401 is a wasteful number, since it uses less digits than its factorization.

21104140401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615445 (or 615442 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21104140401 its reverse (10404140112), we get a palindrome (31508280513).

The spelling of 21104140401 in words is "twenty-one billion, one hundred four million, one hundred forty thousand, four hundred one".