1720121953852 has 12 divisors (see below), whose sum is σ = 3010224270816. Its totient is φ = 860057876480.

The previous prime is 1720121953819. The next prime is 1720121953859. The reversal of 1720121953852 is 2583591210271.

It is a super-2 number, since 2×1720121953852² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720121953859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 853308 + ... + 2041660.

It is an arithmetic number, because the mean of its divisors is an integer number (250852022568).

Almost surely, 2^{1720121953852} is an apocalyptic number.

It is an amenable number.

1720121953852 is a deficient number, since it is larger than the sum of its proper divisors (1290102316964).

1720121953852 is a wasteful number, since it uses less digits than its factorization.

1720121953852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550228 (or 1550226 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 46.

The spelling of 1720121953852 in words is "one trillion, seven hundred twenty billion, one hundred twenty-one million, nine hundred fifty-three thousand, eight hundred fifty-two".