21222021021112 has 32 divisors (see below), whose sum is σ = 40719556500480. Its totient is φ = 10363507630560.

The previous prime is 21222021021101. The next prime is 21222021021119. The reversal of 21222021021112 is 21112012022212.

It is a self number, because there is not a number n which added to its sum of digits gives 21222021021112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222021021119) 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, 2684187 + ... + 7046197.

It is an arithmetic number, because the mean of its divisors is an integer number (1272486140640).

Almost surely, 2^{21222021021112} is an apocalyptic number.

It is an amenable number.

21222021021112 is a deficient number, since it is larger than the sum of its proper divisors (19497535479368).

21222021021112 is a wasteful number, since it uses less digits than its factorization.

21222021021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4376203 (or 4376199 counting only the distinct ones).

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

Adding to 21222021021112 its reverse (21112012022212), we get a palindrome (42334033043324).

The spelling of 21222021021112 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-one million, twenty-one thousand, one hundred twelve".