22001221122112 has 14 divisors (see below), whose sum is σ = 43658673164318. Its totient is φ = 11000610561024.

The previous prime is 22001221122109. The next prime is 22001221122119. The reversal of 22001221122112 is 21122112210022.

It can be written as a sum of positive squares in only one way, i.e., 21084039493696 + 917181628416 = 4591736^2 + 957696^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22001221122112.

It is not an unprimeable number, because it can be changed into a prime (22001221122119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171884539953 + ... + 171884540080.

Almost surely, 2^{22001221122112} is an apocalyptic number.

It is an amenable number.

22001221122112 is a deficient number, since it is larger than the sum of its proper divisors (21657452042206).

22001221122112 is an equidigital number, since it uses as much as digits as its factorization.

22001221122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343769080045 (or 343769080035 counting only the distinct ones).

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

Adding to 22001221122112 its reverse (21122112210022), we get a palindrome (43123333332134).

The spelling of 22001221122112 in words is "twenty-two trillion, one billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred twelve".