22110202222021 has 6 divisors (see below), whose sum is σ = 22340492359890. Its totient is φ = 21882261983616.

The previous prime is 22110202221983. The next prime is 22110202222037. The reversal of 22110202222021 is 12022220201122.

It can be written as a sum of positive squares in 3 ways, for example, as 4087684225 + 22106114537796 = 63935^2 + 4701714^2 .

It is not a de Polignac number, because 22110202222021 - 2¹³ = 22110202213829 is a prime.

It is a super-2 number, since 2×22110202222021² (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 22110202222021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22110202222051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1174940226 + ... + 1174959043.

It is an arithmetic number, because the mean of its divisors is an integer number (3723415393315).

Almost surely, 2^{22110202222021} is an apocalyptic number.

It is an amenable number.

22110202222021 is a deficient number, since it is larger than the sum of its proper divisors (230290137869).

22110202222021 is an frugal number, since it uses more digits than its factorization.

22110202222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349899463 (or 2349899366 counting only the distinct ones).

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

Adding to 22110202222021 its reverse (12022220201122), we get a palindrome (34132422423143).

The spelling of 22110202222021 in words is "twenty-two trillion, one hundred ten billion, two hundred two million, two hundred twenty-two thousand, twenty-one".