10020112099981 has 2 divisors, whose sum is σ = 10020112099982. Its totient is φ = 10020112099980.

The previous prime is 10020112099939. The next prime is 10020112100051. The reversal of 10020112099981 is 18999021102001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9987843726025 + 32268373956 = 3160355^2 + 179634^2 .

It is an emirp because it is prime and its reverse (18999021102001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10020112099981 - 2²⁷ = 10019977882253 is a prime.

It is a super-2 number, since 2×10020112099981² (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 (10020112094981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010056049990 + 5010056049991.

It is an arithmetic number, because the mean of its divisors is an integer number (5010056049991).

Almost surely, 2^{10020112099981} is an apocalyptic number.

It is an amenable number.

10020112099981 is a deficient number, since it is larger than the sum of its proper divisors (1).

10020112099981 is an equidigital number, since it uses as much as digits as its factorization.

10020112099981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 43.

The spelling of 10020112099981 in words is "ten trillion, twenty billion, one hundred twelve million, ninety-nine thousand, nine hundred eighty-one".