21222101222101 has 8 divisors (see below), whose sum is σ = 22856863710464. Its totient is φ = 19587666328560.

The previous prime is 21222101222099. The next prime is 21222101222159. The reversal of 21222101222101 is 10122210122212.

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

It is a cyclic number.

It is not a de Polignac number, because 21222101222101 - 2¹ = 21222101222099 is a prime.

It is a super-2 number, since 2×21222101222101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222101222401) 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, 81764145 + ... + 82023286.

It is an arithmetic number, because the mean of its divisors is an integer number (2857107963808).

Almost surely, 2^{21222101222101} is an apocalyptic number.

It is an amenable number.

21222101222101 is a deficient number, since it is larger than the sum of its proper divisors (1634762488363).

21222101222101 is a wasteful number, since it uses less digits than its factorization.

21222101222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163797411.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21222101222101 its reverse (10122210122212), we get a palindrome (31344311344313).

The spelling of 21222101222101 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred one million, two hundred twenty-two thousand, one hundred one".