20020002212081 has 2 divisors, whose sum is σ = 20020002212082. Its totient is φ = 20020002212080.

The previous prime is 20020002212053. The next prime is 20020002212087. The reversal of 20020002212081 is 18021220002002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19638936749056 + 381065463025 = 4431584^2 + 617305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20020002212081 is a prime.

It is a super-2 number, since 2×20020002212081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20020002212087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010001106040 + 10010001106041.

It is an arithmetic number, because the mean of its divisors is an integer number (10010001106041).

Almost surely, 2^{20020002212081} is an apocalyptic number.

It is an amenable number.

20020002212081 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020002212081 is an equidigital number, since it uses as much as digits as its factorization.

20020002212081 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20020002212081 its reverse (18021220002002), we get a palindrome (38041222214083).

The spelling of 20020002212081 in words is "twenty trillion, twenty billion, two million, two hundred twelve thousand, eighty-one".