1720217130212 has 12 divisors (see below), whose sum is σ = 3440434260480. Its totient is φ = 737235912936.

The previous prime is 1720217130193. The next prime is 1720217130217. The reversal of 1720217130212 is 2120317120271.

1720217130212 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1720217130217) 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, 30718163012 + ... + 30718163067.

It is an arithmetic number, because the mean of its divisors is an integer number (286702855040).

Almost surely, 2^{1720217130212} is an apocalyptic number.

It is an amenable number.

1720217130212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1720217130212 is a wasteful number, since it uses less digits than its factorization.

1720217130212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61436326090 (or 61436326088 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 29.

The spelling of 1720217130212 in words is "one trillion, seven hundred twenty billion, two hundred seventeen million, one hundred thirty thousand, two hundred twelve".