21112122202222 has 4 divisors (see below), whose sum is σ = 31668183303336. Its totient is φ = 10556061101110.

The previous prime is 21112122202211. The next prime is 21112122202279. The reversal of 21112122202222 is 22220222121112.

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

It is a super-2 number, since 2×21112122202222² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21112122202193 and 21112122202202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5278030550554 + ... + 5278030550557.

It is an arithmetic number, because the mean of its divisors is an integer number (7917045825834).

Almost surely, 2^{21112122202222} is an apocalyptic number.

21112122202222 is a deficient number, since it is larger than the sum of its proper divisors (10556061101114).

21112122202222 is a wasteful number, since it uses less digits than its factorization.

21112122202222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10556061101113.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21112122202222 its reverse (22220222121112), we get a palindrome (43332344323334).

The spelling of 21112122202222 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty-two million, two hundred two thousand, two hundred twenty-two".