143642621620421 has 24 divisors (see below), whose sum is σ = 180898142221440. Its totient is φ = 111647377464480.

The previous prime is 143642621620411. The next prime is 143642621620427. The reversal of 143642621620421 is 124026126246341.

It is not a de Polignac number, because 143642621620421 - 2¹⁴ = 143642621604037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143642621620427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 213253001 + ... + 213925518.

It is an arithmetic number, because the mean of its divisors is an integer number (7537422592560).

Almost surely, 2^{143642621620421} is an apocalyptic number.

143642621620421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

143642621620421 is a deficient number, since it is larger than the sum of its proper divisors (37255520601019).

143642621620421 is a wasteful number, since it uses less digits than its factorization.

143642621620421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427178945 (or 427178934 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 44.

Adding to 143642621620421 its reverse (124026126246341), we get a palindrome (267668747866762).

The spelling of 143642621620421 in words is "one hundred forty-three trillion, six hundred forty-two billion, six hundred twenty-one million, six hundred twenty thousand, four hundred twenty-one".