21548101101 has 8 divisors (see below), whose sum is σ = 29721518880. Its totient is φ = 13870042032.

The previous prime is 21548101093. The next prime is 21548101111. The reversal of 21548101101 is 10110184512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21548101101 - 2³ = 21548101093 is a prime.

It is a super-2 number, since 2×21548101101² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21548101111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123839575 + ... + 123839748.

It is an arithmetic number, because the mean of its divisors is an integer number (3715189860).

Almost surely, 2^21548101101 is an apocalyptic number.

It is an amenable number.

21548101101 is a deficient number, since it is larger than the sum of its proper divisors (8173417779).

21548101101 is a wasteful number, since it uses less digits than its factorization.

21548101101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247679355.

The product of its (nonzero) digits is 320, while the sum is 24.

Adding to 21548101101 its reverse (10110184512), we get a palindrome (31658285613).

The spelling of 21548101101 in words is "twenty-one billion, five hundred forty-eight million, one hundred one thousand, one hundred one".