22211212221101 has 4 divisors (see below), whose sum is σ = 22211229834972. Its totient is φ = 22211194607232.

The previous prime is 22211212221073. The next prime is 22211212221139. The reversal of 22211212221101 is 10112221211222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1584763747876 + 20626448473225 = 1258874^2 + 4541635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22211212221101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211212221151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6756260 + ... + 9490493.

It is an arithmetic number, because the mean of its divisors is an integer number (5552807458743).

Almost surely, 2^{22211212221101} is an apocalyptic number.

It is an amenable number.

22211212221101 is a deficient number, since it is larger than the sum of its proper divisors (17613871).

22211212221101 is a wasteful number, since it uses less digits than its factorization.

22211212221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17613870.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 22211212221101 its reverse (10112221211222), we get a palindrome (32323433432323).

The spelling of 22211212221101 in words is "twenty-two trillion, two hundred eleven billion, two hundred twelve million, two hundred twenty-one thousand, one hundred one".