21802101101 has 8 divisors (see below), whose sum is σ = 24337229664. Its totient is φ = 19359159120.

The previous prime is 21802101091. The next prime is 21802101127. The reversal of 21802101101 is 10110120812.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21802101101 is a prime.

It is a super-2 number, since 2×21802101101² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21802101101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21802101161) 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, 23046146 + ... + 23047091.

It is an arithmetic number, because the mean of its divisors is an integer number (3042153708).

Almost surely, 2^21802101101 is an apocalyptic number.

It is an amenable number.

21802101101 is a deficient number, since it is larger than the sum of its proper divisors (2535128563).

21802101101 is a wasteful number, since it uses less digits than its factorization.

21802101101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46093291.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21802101101 its reverse (10110120812), we get a palindrome (31912221913).

The spelling of 21802101101 in words is "twenty-one billion, eight hundred two million, one hundred one thousand, one hundred one".