1217135112 has 32 divisors (see below), whose sum is σ = 3043720800. Its totient is φ = 405593984.

The previous prime is 1217135071. The next prime is 1217135123. The reversal of 1217135112 is 2115317121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127564 + ... + 136772.

It is an arithmetic number, because the mean of its divisors is an integer number (95116275).

Almost surely, 2^1217135112 is an apocalyptic number.

1217135112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1217135112 is an abundant number, since it is smaller than the sum of its proper divisors (1826585688).

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

1217135112 is a wasteful number, since it uses less digits than its factorization.

1217135112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14725 (or 14721 counting only the distinct ones).

The product of its digits is 420, while the sum is 24.

The square root of 1217135112 is about 34887.4635363478. The cubic root of 1217135112 is about 1067.6926762363.

The spelling of 1217135112 in words is "one billion, two hundred seventeen million, one hundred thirty-five thousand, one hundred twelve".