21444505101 has 12 divisors (see below), whose sum is σ = 32322152928. Its totient is φ = 13674756744.

The previous prime is 21444505051. The next prime is 21444505123. The reversal of 21444505101 is 10150544412.

21444505101 is a `hidden beast` number, since 2 + 14 + 44 + 505 + 101 = 666.

It is not a de Polignac number, because 21444505101 - 2¹⁴ = 21444488717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21444505141) 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, 51798115 + ... + 51798528.

It is an arithmetic number, because the mean of its divisors is an integer number (2693512744).

Almost surely, 2^21444505101 is an apocalyptic number.

It is an amenable number.

21444505101 is a deficient number, since it is larger than the sum of its proper divisors (10877647827).

21444505101 is a wasteful number, since it uses less digits than its factorization.

21444505101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103596672 (or 103596669 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The spelling of 21444505101 in words is "twenty-one billion, four hundred forty-four million, five hundred five thousand, one hundred one".