22021220212112 has 30 divisors (see below), whose sum is σ = 46897464329814. Its totient is φ = 10009645550080.

The previous prime is 22021220212111. The next prime is 22021220212139. The reversal of 22021220212112 is 21121202212022.

It can be written as a sum of positive squares in only one way, i.e., 16509074154496 + 5512146057616 = 4063136^2 + 2347796^2 .

It is not an unprimeable number, because it can be changed into a prime (22021220212111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5687296673 + ... + 5687300544.

Almost surely, 2^{22021220212112} is an apocalyptic number.

22021220212112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22021220212112 is an abundant number, since it is smaller than the sum of its proper divisors (24876244117702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22021220212112 is a wasteful number, since it uses less digits than its factorization.

22021220212112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11374597247 (or 11374597230 counting only the distinct ones).

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

Adding to 22021220212112 its reverse (21121202212022), we get a palindrome (43142422424134).

The spelling of 22021220212112 in words is "twenty-two trillion, twenty-one billion, two hundred twenty million, two hundred twelve thousand, one hundred twelve".