21112210222222 has 8 divisors (see below), whose sum is σ = 36192360380976. Its totient is φ = 9048090095232.

The previous prime is 21112210222193. The next prime is 21112210222241. The reversal of 21112210222222 is 22222201221112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21112210222222² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21112210222193 and 21112210222202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 754007507923 + ... + 754007507950.

It is an arithmetic number, because the mean of its divisors is an integer number (4524045047622).

Almost surely, 2^{21112210222222} is an apocalyptic number.

21112210222222 is a deficient number, since it is larger than the sum of its proper divisors (15080150158754).

21112210222222 is a wasteful number, since it uses less digits than its factorization.

21112210222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508015015882.

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

Adding to 21112210222222 its reverse (22222201221112), we get a palindrome (43334411443334).

The spelling of 21112210222222 in words is "twenty-one trillion, one hundred twelve billion, two hundred ten million, two hundred twenty-two thousand, two hundred twenty-two".