20020110011081 has 2 divisors, whose sum is σ = 20020110011082. Its totient is φ = 20020110011080.

The previous prime is 20020110011063. The next prime is 20020110011107. The reversal of 20020110011081 is 18011001102002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15787589689600 + 4232520321481 = 3973360^2 + 2057309^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020110011081 - 2¹⁸ = 20020109748937 is a prime.

It is a super-3 number, since 3×20020110011081³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20020110011051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010055005540 + 10010055005541.

It is an arithmetic number, because the mean of its divisors is an integer number (10010055005541).

Almost surely, 2^{20020110011081} is an apocalyptic number.

It is an amenable number.

20020110011081 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020110011081 is an equidigital number, since it uses as much as digits as its factorization.

20020110011081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 20020110011081 its reverse (18011001102002), we get a palindrome (38031111113083).

The spelling of 20020110011081 in words is "twenty trillion, twenty billion, one hundred ten million, eleven thousand, eighty-one".