10201781011 has 4 divisors (see below), whose sum is σ = 10258144624. Its totient is φ = 10145417400.

The previous prime is 10201780991. The next prime is 10201781027. The reversal of 10201781011 is 11018710201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10201781011 - 2⁹ = 10201780499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10201781411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28181535 + ... + 28181896.

It is an arithmetic number, because the mean of its divisors is an integer number (2564536156).

Almost surely, 2^10201781011 is an apocalyptic number.

10201781011 is a deficient number, since it is larger than the sum of its proper divisors (56363613).

10201781011 is an equidigital number, since it uses as much as digits as its factorization.

10201781011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56363612.

The product of its (nonzero) digits is 112, while the sum is 22.

The spelling of 10201781011 in words is "ten billion, two hundred one million, seven hundred eighty-one thousand, eleven".