256724102212111 has 32 divisors (see below), whose sum is σ = 286802968181760. Its totient is φ = 228369117689856.

The previous prime is 256724102212057. The next prime is 256724102212139. The reversal of 256724102212111 is 111212201427652.

It is not a de Polignac number, because 256724102212111 - 2¹¹ = 256724102210063 is a prime.

It is a super-2 number, since 2×256724102212111² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256724102212511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1788111450 + ... + 1788255016.

It is an arithmetic number, because the mean of its divisors is an integer number (8962592755680).

Almost surely, 2^{256724102212111} is an apocalyptic number.

256724102212111 is a deficient number, since it is larger than the sum of its proper divisors (30078865969649).

256724102212111 is a wasteful number, since it uses less digits than its factorization.

256724102212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156543.

The product of its (nonzero) digits is 26880, while the sum is 37.

Adding to 256724102212111 its reverse (111212201427652), we get a palindrome (367936303639763).

The spelling of 256724102212111 in words is "two hundred fifty-six trillion, seven hundred twenty-four billion, one hundred two million, two hundred twelve thousand, one hundred eleven".