21222201102101 has 4 divisors (see below), whose sum is σ = 21238290717600. Its totient is φ = 21206111486604.

The previous prime is 21222201102061. The next prime is 21222201102133. The reversal of 21222201102101 is 10120110222212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21222201102101 - 2²² = 21222196907797 is a prime.

It is a super-2 number, since 2×21222201102101² (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 21222201102101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222201105101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8044805771 + ... + 8044808408.

It is an arithmetic number, because the mean of its divisors is an integer number (5309572679400).

Almost surely, 2^{21222201102101} is an apocalyptic number.

It is an amenable number.

21222201102101 is a deficient number, since it is larger than the sum of its proper divisors (16089615499).

21222201102101 is a wasteful number, since it uses less digits than its factorization.

21222201102101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16089615498.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21222201102101 its reverse (10120110222212), we get a palindrome (31342311324313).

The spelling of 21222201102101 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred one million, one hundred two thousand, one hundred one".