10001020961887 has 2 divisors, whose sum is σ = 10001020961888. Its totient is φ = 10001020961886.

The previous prime is 10001020961879. The next prime is 10001020961923. The reversal of 10001020961887 is 78816902010001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10001020961887 - 2³ = 10001020961879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10001020931887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000510480943 + 5000510480944.

It is an arithmetic number, because the mean of its divisors is an integer number (5000510480944).

Almost surely, 2^{10001020961887} is an apocalyptic number.

10001020961887 is a deficient number, since it is larger than the sum of its proper divisors (1).

10001020961887 is an equidigital number, since it uses as much as digits as its factorization.

10001020961887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 43.

Adding to 10001020961887 its reverse (78816902010001), we get a palindrome (88817922971888).

The spelling of 10001020961887 in words is "ten trillion, one billion, twenty million, nine hundred sixty-one thousand, eight hundred eighty-seven".