1351220533421 has 8 divisors (see below), whose sum is σ = 1474106901600. Its totient is φ = 1228342188240.

The previous prime is 1351220533357. The next prime is 1351220533451. The reversal of 1351220533421 is 1243350221531.

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 1351220533421 - 2⁶ = 1351220533357 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 (1351220533451) 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 7 ways as a sum of consecutive naturals, for example, 1650866 + ... + 2329763.

It is an arithmetic number, because the mean of its divisors is an integer number (184263362700).

Almost surely, 2^{1351220533421} is an apocalyptic number.

1351220533421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1351220533421 is a deficient number, since it is larger than the sum of its proper divisors (122886368179).

1351220533421 is a wasteful number, since it uses less digits than its factorization.

1351220533421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4011499.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 1351220533421 its reverse (1243350221531), we get a palindrome (2594570754952).

The spelling of 1351220533421 in words is "one trillion, three hundred fifty-one billion, two hundred twenty million, five hundred thirty-three thousand, four hundred twenty-one".