11871652320111 has 16 divisors (see below), whose sum is σ = 16226062072704. Its totient is φ = 7716499611744.

The previous prime is 11871652320097. The next prime is 11871652320263. The reversal of 11871652320111 is 11102325617811.

It is not a de Polignac number, because 11871652320111 - 2¹⁷ = 11871652189039 is a prime.

It is a super-2 number, since 2×11871652320111² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11871652320111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11871652320611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82538841 + ... + 82682546.

It is an arithmetic number, because the mean of its divisors is an integer number (1014128879544).

Almost surely, 2^{11871652320111} is an apocalyptic number.

11871652320111 is a deficient number, since it is larger than the sum of its proper divisors (4354409752593).

11871652320111 is a wasteful number, since it uses less digits than its factorization.

11871652320111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165221990.

The product of its (nonzero) digits is 20160, while the sum is 39.

Adding to 11871652320111 its reverse (11102325617811), we get a palindrome (22973977937922).

It can be divided in two parts, 1187165 and 2320111, that added together give a triangular number (3507276 = T₂₆₄₈).

The spelling of 11871652320111 in words is "eleven trillion, eight hundred seventy-one billion, six hundred fifty-two million, three hundred twenty thousand, one hundred eleven".