1721420324101 has 8 divisors (see below), whose sum is σ = 1731912256800. Its totient is φ = 1710938114640.

The previous prime is 1721420324087. The next prime is 1721420324111. The reversal of 1721420324101 is 1014230241271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1721420324101 - 2⁵ = 1721420324069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1721420324101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1721420324111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2075490 + ... + 2783971.

It is an arithmetic number, because the mean of its divisors is an integer number (216489032100).

Almost surely, 2^{1721420324101} is an apocalyptic number.

It is an amenable number.

1721420324101 is a deficient number, since it is larger than the sum of its proper divisors (10491932699).

1721420324101 is a wasteful number, since it uses less digits than its factorization.

1721420324101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4861619.

The product of its (nonzero) digits is 2688, while the sum is 28.

Adding to 1721420324101 its reverse (1014230241271), we get a palindrome (2735650565372).

The spelling of 1721420324101 in words is "one trillion, seven hundred twenty-one billion, four hundred twenty million, three hundred twenty-four thousand, one hundred one".