21112120021222 has 8 divisors (see below), whose sum is σ = 31869888185376. Its totient is φ = 10488823959432.

The previous prime is 21112120021177. The next prime is 21112120021241. The reversal of 21112120021222 is 22212002121112.

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

It is a super-2 number, since 2×21112120021222² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21112120021222.

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, 33618025198 + ... + 33618025825.

It is an arithmetic number, because the mean of its divisors is an integer number (3983736023172).

Almost surely, 2^{21112120021222} is an apocalyptic number.

21112120021222 is a deficient number, since it is larger than the sum of its proper divisors (10757768164154).

21112120021222 is a wasteful number, since it uses less digits than its factorization.

21112120021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67236051182.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21112120021222 its reverse (22212002121112), we get a palindrome (43324122142334).

The spelling of 21112120021222 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty million, twenty-one thousand, two hundred twenty-two".