1342643522221 has 8 divisors (see below), whose sum is σ = 1376037041400. Its totient is φ = 1309280770560.

The previous prime is 1342643522219. The next prime is 1342643522251. The reversal of 1342643522221 is 1222253462431.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 257121225 + 1342386400996 = 16035^2 + 1158614^2 .

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 1342643522221 - 2¹ = 1342643522219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1342643522201) 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, 7603506 + ... + 7778083.

It is an arithmetic number, because the mean of its divisors is an integer number (172004630175).

Almost surely, 2^{1342643522221} is an apocalyptic number.

It is an amenable number.

1342643522221 is a deficient number, since it is larger than the sum of its proper divisors (33393519179).

1342643522221 is a wasteful number, since it uses less digits than its factorization.

1342643522221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15383759.

The product of its digits is 138240, while the sum is 37.

Adding to 1342643522221 its reverse (1222253462431), we get a palindrome (2564896984652).

The spelling of 1342643522221 in words is "one trillion, three hundred forty-two billion, six hundred forty-three million, five hundred twenty-two thousand, two hundred twenty-one".