12101261217 has 4 divisors (see below), whose sum is σ = 16135014960. Its totient is φ = 8067507476.

The previous prime is 12101261209. The next prime is 12101261243. The reversal of 12101261217 is 71216210121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12101261217 - 2³ = 12101261209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12101261017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2016876867 + ... + 2016876872.

It is an arithmetic number, because the mean of its divisors is an integer number (4033753740).

Almost surely, 2^12101261217 is an apocalyptic number.

It is an amenable number.

12101261217 is a deficient number, since it is larger than the sum of its proper divisors (4033753743).

12101261217 is an equidigital number, since it uses as much as digits as its factorization.

12101261217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4033753742.

The product of its (nonzero) digits is 336, while the sum is 24.

Adding to 12101261217 its reverse (71216210121), we get a palindrome (83317471338).

The spelling of 12101261217 in words is "twelve billion, one hundred one million, two hundred sixty-one thousand, two hundred seventeen".