21211110212222 has 16 divisors (see below), whose sum is σ = 36363747884640. Its totient is φ = 9090014639328.

The previous prime is 21211110212221. The next prime is 21211110212231. The reversal of 21211110212222 is 22221201111212.

It is a super-3 number, since 3×21211110212222³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 21211110212194 and 21211110212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211110212221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38144597 + ... + 38696672.

It is an arithmetic number, because the mean of its divisors is an integer number (2272734242790).

Almost surely, 2^{21211110212222} is an apocalyptic number.

21211110212222 is a deficient number, since it is larger than the sum of its proper divisors (15152637672418).

21211110212222 is a wasteful number, since it uses less digits than its factorization.

21211110212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76860995.

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

Adding to 21211110212222 its reverse (22221201111212), we get a palindrome (43432311323434).

The spelling of 21211110212222 in words is "twenty-one trillion, two hundred eleven billion, one hundred ten million, two hundred twelve thousand, two hundred twenty-two".