10020111211181 has 2 divisors, whose sum is σ = 10020111211182. Its totient is φ = 10020111211180.

The previous prime is 10020111211169. The next prime is 10020111211223. The reversal of 10020111211181 is 18111211102001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10015737505225 + 4373705956 = 3164765^2 + 66134^2 .

It is a cyclic number.

It is not a de Polignac number, because 10020111211181 - 2³⁸ = 9745233304237 is a prime.

It is a super-2 number, since 2×10020111211181² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10020111241181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010055605590 + 5010055605591.

It is an arithmetic number, because the mean of its divisors is an integer number (5010055605591).

Almost surely, 2^{10020111211181} is an apocalyptic number.

It is an amenable number.

10020111211181 is a deficient number, since it is larger than the sum of its proper divisors (1).

10020111211181 is an equidigital number, since it uses as much as digits as its factorization.

10020111211181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 20.

Adding to 10020111211181 its reverse (18111211102001), we get a palindrome (28131322313182).

The spelling of 10020111211181 in words is "ten trillion, twenty billion, one hundred eleven million, two hundred eleven thousand, one hundred eighty-one".