21260540526111 has 16 divisors (see below), whose sum is σ = 31619653884000. Its totient is φ = 14118543120384.

The previous prime is 21260540526091. The next prime is 21260540526131. The reversal of 21260540526111 is 11162504506212.

21260540526111 is a `hidden beast` number, since 2 + 1 + 2 + 6 + 0 + 540 + 52 + 61 + 1 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (21260540526091) and next prime (21260540526131).

It is not a de Polignac number, because 21260540526111 - 2⁹ = 21260540525599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21260540526131) 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, 1531953036 + ... + 1531966913.

It is an arithmetic number, because the mean of its divisors is an integer number (1976228367750).

Almost surely, 2^{21260540526111} is an apocalyptic number.

21260540526111 is a deficient number, since it is larger than the sum of its proper divisors (10359113357889).

21260540526111 is a wasteful number, since it uses less digits than its factorization.

21260540526111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3063920215 (or 3063920209 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The spelling of 21260540526111 in words is "twenty-one trillion, two hundred sixty billion, five hundred forty million, five hundred twenty-six thousand, one hundred eleven".