142421421555321 has 8 divisors (see below), whose sum is σ = 189895550175744. Its totient is φ = 94947453652560.

The previous prime is 142421421555289. The next prime is 142421421555379. The reversal of 142421421555321 is 123555124124241.

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

It is not a de Polignac number, because 142421421555321 - 2⁵ = 142421421555289 is a prime.

It is a super-2 number, since 2×142421421555321² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142421421559321) 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, 38096281 + ... + 41667366.

It is an arithmetic number, because the mean of its divisors is an integer number (23736943771968).

Almost surely, 2^{142421421555321} is an apocalyptic number.

It is an amenable number.

142421421555321 is a deficient number, since it is larger than the sum of its proper divisors (47474128620423).

142421421555321 is an equidigital number, since it uses as much as digits as its factorization.

142421421555321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80358831.

The product of its digits is 384000, while the sum is 42.

Adding to 142421421555321 its reverse (123555124124241), we get a palindrome (265976545679562).

The spelling of 142421421555321 in words is "one hundred forty-two trillion, four hundred twenty-one billion, four hundred twenty-one million, five hundred fifty-five thousand, three hundred twenty-one".