21201010110001 has 16 divisors (see below), whose sum is σ = 22060878997248. Its totient is φ = 20359302825600.

The previous prime is 21201010109959. The next prime is 21201010110043. The reversal of 21201010110001 is 10001101010212.

It is an interprime number because it is at equal distance from previous prime (21201010109959) and next prime (21201010110043).

It is not a de Polignac number, because 21201010110001 - 2³¹ = 21198862626353 is a prime.

It is a super-2 number, since 2×21201010110001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21201010110001.

It is not an unprimeable number, because it can be changed into a prime (21201010119001) 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, 10572426 + ... + 12416851.

It is an arithmetic number, because the mean of its divisors is an integer number (1378804937328).

Almost surely, 2^{21201010110001} is an apocalyptic number.

It is an amenable number.

21201010110001 is a deficient number, since it is larger than the sum of its proper divisors (859868887247).

21201010110001 is a wasteful number, since it uses less digits than its factorization.

21201010110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22989672.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21201010110001 its reverse (10001101010212), we get a palindrome (31202111120213).

The spelling of 21201010110001 in words is "twenty-one trillion, two hundred one billion, ten million, one hundred ten thousand, one".