10010100109981 has 2 divisors, whose sum is σ = 10010100109982. Its totient is φ = 10010100109980.

The previous prime is 10010100109949. The next prime is 10010100110033. The reversal of 10010100109981 is 18990100101001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6421003960900 + 3589096149081 = 2533970^2 + 1894491^2 .It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 18660100101001 and 10010100106681.

It is a cyclic number.

It is not a de Polignac number, because 10010100109981 - 2⁵ = 10010100109949 is a prime.

It is a super-2 number, since 2×10010100109981² (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 (10010100109931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005050054990 + 5005050054991.

It is an arithmetic number, because the mean of its divisors is an integer number (5005050054991).

Almost surely, 2^{10010100109981} is an apocalyptic number.

It is an amenable number.

10010100109981 is a deficient number, since it is larger than the sum of its proper divisors (1).

10010100109981 is an equidigital number, since it uses as much as digits as its factorization.

10010100109981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 31.

The spelling of 10010100109981 in words is "ten trillion, ten billion, one hundred million, one hundred nine thousand, nine hundred eighty-one".