10128990901 has 2 divisors, whose sum is σ = 10128990902. Its totient is φ = 10128990900.

The previous prime is 10128990899. The next prime is 10128990913. The reversal of 10128990901 is 10909982101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9472350276 + 656640625 = 97326^2 + 25625^2 .

It is a cyclic number.

It is not a de Polignac number, because 10128990901 - 2¹ = 10128990899 is a prime.

It is a super-3 number, since 3×10128990901³ (a number of 31 digits) contains 333 as substring.

Together with 10128990899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10128990941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5064495450 + 5064495451.

It is an arithmetic number, because the mean of its divisors is an integer number (5064495451).

Almost surely, 2^10128990901 is an apocalyptic number.

It is an amenable number.

10128990901 is a deficient number, since it is larger than the sum of its proper divisors (1).

10128990901 is an equidigital number, since it uses as much as digits as its factorization.

10128990901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 40.

The spelling of 10128990901 in words is "ten billion, one hundred twenty-eight million, nine hundred ninety thousand, nine hundred one".