143126363221991 has 2 divisors, whose sum is σ = 143126363221992. Its totient is φ = 143126363221990.

The previous prime is 143126363221987. The next prime is 143126363222021. The reversal of 143126363221991 is 199122363621341.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 143126363221991 - 2² = 143126363221987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143126363221981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71563181610995 + 71563181610996.

It is an arithmetic number, because the mean of its divisors is an integer number (71563181610996).

Almost surely, 2^{143126363221991} is an apocalyptic number.

143126363221991 is a deficient number, since it is larger than the sum of its proper divisors (1).

143126363221991 is an equidigital number, since it uses as much as digits as its factorization.

143126363221991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2519424, while the sum is 53.

The spelling of 143126363221991 in words is "one hundred forty-three trillion, one hundred twenty-six billion, three hundred sixty-three million, two hundred twenty-one thousand, nine hundred ninety-one".