1217071020 has 96 divisors (see below), whose sum is σ = 3750727680. Its totient is φ = 292418560.

The previous prime is 1217071003. The next prime is 1217071061. The reversal of 1217071020 is 201707121.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66421 + ... + 82739.

It is an arithmetic number, because the mean of its divisors is an integer number (39070080).

Almost surely, 2^1217071020 is an apocalyptic number.

1217071020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1217071020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1875363840).

1217071020 is an abundant number, since it is smaller than the sum of its proper divisors (2533656660).

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

1217071020 is a wasteful number, since it uses less digits than its factorization.

1217071020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16455 (or 16453 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 21.

The square root of 1217071020 is about 34886.5449708050. The cubic root of 1217071020 is about 1067.6739350246.

Adding to 1217071020 its reverse (201707121), we get a palindrome (1418778141).

The spelling of 1217071020 in words is "one billion, two hundred seventeen million, seventy-one thousand, twenty".