21112110212222 has 16 divisors (see below), whose sum is σ = 33095186340480. Its totient is φ = 10081774328472.

The previous prime is 21112110212131. The next prime is 21112110212233. The reversal of 21112110212222 is 22221201121112.

It is a super-2 number, since 2×21112110212222² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21112110212194 and 21112110212203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348193448 + ... + 348254075.

It is an arithmetic number, because the mean of its divisors is an integer number (2068449146280).

Almost surely, 2^{21112110212222} is an apocalyptic number.

21112110212222 is a deficient number, since it is larger than the sum of its proper divisors (11983076128258).

21112110212222 is a wasteful number, since it uses less digits than its factorization.

21112110212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696448207.

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

Adding to 21112110212222 its reverse (22221201121112), we get a palindrome (43333311333334).

The spelling of 21112110212222 in words is "twenty-one trillion, one hundred twelve billion, one hundred ten million, two hundred twelve thousand, two hundred twenty-two".