143642621620321 has 2 divisors, whose sum is σ = 143642621620322. Its totient is φ = 143642621620320.

The previous prime is 143642621620261. The next prime is 143642621620327. The reversal of 143642621620321 is 123026126246341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130218018738721 + 13424602881600 = 11411311^2 + 3663960^2 .

It is a cyclic number.

It is not a de Polignac number, because 143642621620321 - 2²³ = 143642613231713 is a prime.

It is not a weakly prime, because it can be changed into another prime (143642621620327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71821310810160 + 71821310810161.

It is an arithmetic number, because the mean of its divisors is an integer number (71821310810161).

Almost surely, 2^{143642621620321} is an apocalyptic number.

It is an amenable number.

143642621620321 is a deficient number, since it is larger than the sum of its proper divisors (1).

143642621620321 is an equidigital number, since it uses as much as digits as its factorization.

143642621620321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 43.

Adding to 143642621620321 its reverse (123026126246341), we get a palindrome (266668747866662).

The spelling of 143642621620321 in words is "one hundred forty-three trillion, six hundred forty-two billion, six hundred twenty-one million, six hundred twenty thousand, three hundred twenty-one".