21001101404 has 12 divisors (see below), whose sum is σ = 37937473728. Its totient is φ = 10161823200.

The previous prime is 21001101391. The next prime is 21001101409. The reversal of 21001101404 is 40410110012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001101409) 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, 84681737 + ... + 84681984.

It is an arithmetic number, because the mean of its divisors is an integer number (3161456144).

Almost surely, 2^21001101404 is an apocalyptic number.

It is an amenable number.

21001101404 is a deficient number, since it is larger than the sum of its proper divisors (16936372324).

21001101404 is a wasteful number, since it uses less digits than its factorization.

21001101404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169363756 (or 169363754 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21001101404 its reverse (40410110012), we get a palindrome (61411211416).

The spelling of 21001101404 in words is "twenty-one billion, one million, one hundred one thousand, four hundred four".