21071170101 has 16 divisors (see below), whose sum is σ = 28558108800. Its totient is φ = 13817670720.

The previous prime is 21071170093. The next prime is 21071170103. The reversal of 21071170101 is 10107117012.

It is not a de Polignac number, because 21071170101 - 2³ = 21071170093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21071170103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182790 + ... + 274871.

It is an arithmetic number, because the mean of its divisors is an integer number (1784881800).

Almost surely, 2^21071170101 is an apocalyptic number.

It is an amenable number.

21071170101 is a deficient number, since it is larger than the sum of its proper divisors (7486938699).

21071170101 is a wasteful number, since it uses less digits than its factorization.

21071170101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457916.

The product of its (nonzero) digits is 98, while the sum is 21.

Adding to 21071170101 its reverse (10107117012), we get a palindrome (31178287113).

The spelling of 21071170101 in words is "twenty-one billion, seventy-one million, one hundred seventy thousand, one hundred one".