20101011256 has 16 divisors (see below), whose sum is σ = 37735203600. Its totient is φ = 10038290304.

The previous prime is 20101011173. The next prime is 20101011257. The reversal of 20101011256 is 65211010102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101011257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1519921 + ... + 1533088.

It is an arithmetic number, because the mean of its divisors is an integer number (2358450225).

Almost surely, 2^20101011256 is an apocalyptic number.

It is an amenable number.

20101011256 is a deficient number, since it is larger than the sum of its proper divisors (17634192344).

20101011256 is a wasteful number, since it uses less digits than its factorization.

20101011256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3053838 (or 3053834 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 20101011256 its reverse (65211010102), we get a palindrome (85312021358).

The spelling of 20101011256 in words is "twenty billion, one hundred one million, eleven thousand, two hundred fifty-six".