22012112220121 has 2 divisors, whose sum is σ = 22012112220122. Its totient is φ = 22012112220120.

The previous prime is 22012112220073. The next prime is 22012112220127. The reversal of 22012112220121 is 12102221121022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21711080035225 + 301032184896 = 4659515^2 + 548664^2 .

It is a cyclic number.

It is not a de Polignac number, because 22012112220121 - 2⁹ = 22012112219609 is a prime.

It is not a weakly prime, because it can be changed into another prime (22012112220127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11006056110060 + 11006056110061.

It is an arithmetic number, because the mean of its divisors is an integer number (11006056110061).

Almost surely, 2^{22012112220121} is an apocalyptic number.

It is an amenable number.

22012112220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22012112220121 is an equidigital number, since it uses as much as digits as its factorization.

22012112220121 is an evil number, because the sum of its binary digits is even.

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

Adding to 22012112220121 its reverse (12102221121022), we get a palindrome (34114333341143).

The spelling of 22012112220121 in words is "twenty-two trillion, twelve billion, one hundred twelve million, two hundred twenty thousand, one hundred twenty-one".