1217112051 has 8 divisors (see below), whose sum is σ = 1708227520. Its totient is φ = 768702312.

The previous prime is 1217112037. The next prime is 1217112067. The reversal of 1217112051 is 1502117121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1217112051 - 2¹³ = 1217103859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1217112031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10676365 + ... + 10676478.

It is an arithmetic number, because the mean of its divisors is an integer number (213528440).

Almost surely, 2^1217112051 is an apocalyptic number.

1217112051 is a deficient number, since it is larger than the sum of its proper divisors (491115469).

1217112051 is a wasteful number, since it uses less digits than its factorization.

1217112051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21352865.

The product of its (nonzero) digits is 140, while the sum is 21.

The square root of 1217112051 is about 34887.1330292416. The cubic root of 1217112051 is about 1067.6859330199.

Adding to 1217112051 its reverse (1502117121), we get a palindrome (2719229172).

The spelling of 1217112051 in words is "one billion, two hundred seventeen million, one hundred twelve thousand, fifty-one".