22222021220101 has 4 divisors (see below), whose sum is σ = 22247244854604. Its totient is φ = 22196797585600.

The previous prime is 22222021220027. The next prime is 22222021220129. The reversal of 22222021220101 is 10102212022222.

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 6600942792900 + 15621078427201 = 2569230^2 + 3952351^2 .

It is a cyclic number.

It is not a de Polignac number, because 22222021220101 - 2³¹ = 22219873736453 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 (22222021220131) 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, 12611815930 + ... + 12611817691.

It is an arithmetic number, because the mean of its divisors is an integer number (5561811213651).

Almost surely, 2^{22222021220101} is an apocalyptic number.

It is an amenable number.

22222021220101 is a deficient number, since it is larger than the sum of its proper divisors (25223634503).

22222021220101 is an equidigital number, since it uses as much as digits as its factorization.

22222021220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25223634502.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 22222021220101 its reverse (10102212022222), we get a palindrome (32324233242323).

The spelling of 22222021220101 in words is "twenty-two trillion, two hundred twenty-two billion, twenty-one million, two hundred twenty thousand, one hundred one".