12720101517105 has 32 divisors (see below), whose sum is σ = 21054209299200. Its totient is φ = 6550044033792.

The previous prime is 12720101517091. The next prime is 12720101517113. The reversal of 12720101517105 is 50171510102721.

It is not a de Polignac number, because 12720101517105 - 2⁴ = 12720101517089 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65552887 + ... + 65746643.

It is an arithmetic number, because the mean of its divisors is an integer number (657944040600).

Almost surely, 2^{12720101517105} is an apocalyptic number.

12720101517105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12720101517105 is a deficient number, since it is larger than the sum of its proper divisors (8334107782095).

12720101517105 is a wasteful number, since it uses less digits than its factorization.

12720101517105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344713.

The product of its (nonzero) digits is 4900, while the sum is 33.

Adding to 12720101517105 its reverse (50171510102721), we get a palindrome (62891611619826).

The spelling of 12720101517105 in words is "twelve trillion, seven hundred twenty billion, one hundred one million, five hundred seventeen thousand, one hundred five".