1351705426221 has 16 divisors (see below), whose sum is σ = 1811478848000. Its totient is φ = 896535219888.

The previous prime is 1351705426213. The next prime is 1351705426241. The reversal of 1351705426221 is 1226245071531.

It is not a de Polignac number, because 1351705426221 - 2³ = 1351705426213 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 1351705426221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351705426241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7762650 + ... + 7934868.

It is an arithmetic number, because the mean of its divisors is an integer number (113217428000).

Almost surely, 2^{1351705426221} is an apocalyptic number.

It is an amenable number.

1351705426221 is a deficient number, since it is larger than the sum of its proper divisors (459773421779).

1351705426221 is a wasteful number, since it uses less digits than its factorization.

1351705426221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185568.

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 1351705426221 in words is "one trillion, three hundred fifty-one billion, seven hundred five million, four hundred twenty-six thousand, two hundred twenty-one".