21440320101 has 12 divisors (see below), whose sum is σ = 30971859360. Its totient is φ = 14292389160.

The previous prime is 21440320093. The next prime is 21440320127. The reversal of 21440320101 is 10102304412.

21440320101 is a `hidden beast` number, since 21 + 440 + 3 + 201 + 0 + 1 = 666.

It is not a de Polignac number, because 21440320101 - 2³ = 21440320093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21440320301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29496 + ... + 209166.

It is an arithmetic number, because the mean of its divisors is an integer number (2580988280).

Almost surely, 2^21440320101 is an apocalyptic number.

It is an amenable number.

21440320101 is a deficient number, since it is larger than the sum of its proper divisors (9531539259).

21440320101 is a wasteful number, since it uses less digits than its factorization.

21440320101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192936 (or 192933 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21440320101 its reverse (10102304412), we get a palindrome (31542624513).

The spelling of 21440320101 in words is "twenty-one billion, four hundred forty million, three hundred twenty thousand, one hundred one".