1720122221712 has 80 divisors (see below), whose sum is σ = 4564144225280. Its totient is φ = 557829006336.

The previous prime is 1720122221681. The next prime is 1720122221827. The reversal of 1720122221712 is 2171222210271.

It is a self number, because there is not a number n which added to its sum of digits gives 1720122221712.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 24400788 + ... + 24471180.

It is an arithmetic number, because the mean of its divisors is an integer number (57051802816).

Almost surely, 2^{1720122221712} is an apocalyptic number.

1720122221712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1720122221712 is an abundant number, since it is smaller than the sum of its proper divisors (2844022003568).

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

1720122221712 is a wasteful number, since it uses less digits than its factorization.

1720122221712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84200 (or 84194 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 30.

Adding to 1720122221712 its reverse (2171222210271), we get a palindrome (3891344431983).

The spelling of 1720122221712 in words is "one trillion, seven hundred twenty billion, one hundred twenty-two million, two hundred twenty-one thousand, seven hundred twelve".