2122020055681 has 2 divisors, whose sum is σ = 2122020055682. Its totient is φ = 2122020055680.

The previous prime is 2122020055657. The next prime is 2122020055693. The reversal of 2122020055681 is 1865500202212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1839777555456 + 282242500225 = 1356384^2 + 531265^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122020055681 - 2¹³ = 2122020047489 is a prime.

It is a super-2 number, since 2×2122020055681² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2122020055081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061010027840 + 1061010027841.

It is an arithmetic number, because the mean of its divisors is an integer number (1061010027841).

Almost surely, 2^{2122020055681} is an apocalyptic number.

It is an amenable number.

2122020055681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122020055681 is an equidigital number, since it uses as much as digits as its factorization.

2122020055681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 34.

Adding to 2122020055681 its reverse (1865500202212), we get a palindrome (3987520257893).

The spelling of 2122020055681 in words is "two trillion, one hundred twenty-two billion, twenty million, fifty-five thousand, six hundred eighty-one".