12721771710 has 112 divisors (see below), whose sum is σ = 34435795680. Its totient is φ = 3382326720.

The previous prime is 12721771703. The next prime is 12721771717. The reversal of 12721771710 is 1717712721.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12721771703) and next prime (12721771717).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12721771717) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 2614680 + ... + 2619540.

Almost surely, 2^12721771710 is an apocalyptic number.

12721771710 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12721771710, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17217897840).

12721771710 is an abundant number, since it is smaller than the sum of its proper divisors (21714023970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12721771710 is an equidigital number, since it uses as much as digits as its factorization.

12721771710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5245 (or 5230 counting only the distinct ones).

The product of its (nonzero) digits is 9604, while the sum is 36.

The spelling of 12721771710 in words is "twelve billion, seven hundred twenty-one million, seven hundred seventy-one thousand, seven hundred ten".