21222022012112 has 10 divisors (see below), whose sum is σ = 41117667648498. Its totient is φ = 10611011006048.

The previous prime is 21222022012039. The next prime is 21222022012171. The reversal of 21222022012112 is 21121022022212.

It can be written as a sum of positive squares in only one way, i.e., 17319880064656 + 3902141947456 = 4161716^2 + 1975384^2 .

It is a super-2 number, since 2×21222022012112² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663188187863 + ... + 663188187894.

Almost surely, 2^{21222022012112} is an apocalyptic number.

It is an amenable number.

21222022012112 is a deficient number, since it is larger than the sum of its proper divisors (19895645636386).

21222022012112 is a wasteful number, since it uses less digits than its factorization.

21222022012112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326376375765 (or 1326376375759 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21222022012112 its reverse (21121022022212), we get a palindrome (42343044034324).

It can be divided in two parts, 2122202 and 2012112, that added together give a palindrome (4134314).

The spelling of 21222022012112 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-two million, twelve thousand, one hundred twelve".