21711106170725 has 12 divisors (see below), whose sum is σ = 26928895815360. Its totient is φ = 17364288702000.

The previous prime is 21711106170713. The next prime is 21711106170773. The reversal of 21711106170725 is 52707160111712.

It is not a de Polignac number, because 21711106170725 - 2¹⁴ = 21711106154341 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114809501 + ... + 114998450.

It is an arithmetic number, because the mean of its divisors is an integer number (2244074651280).

Almost surely, 2^{21711106170725} is an apocalyptic number.

21711106170725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21711106170725 is a deficient number, since it is larger than the sum of its proper divisors (5217789644635).

21711106170725 is a wasteful number, since it uses less digits than its factorization.

21711106170725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229811740 (or 229811735 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 41.

The spelling of 21711106170725 in words is "twenty-one trillion, seven hundred eleven billion, one hundred six million, one hundred seventy thousand, seven hundred twenty-five".