142101822581 has 2 divisors, whose sum is σ = 142101822582. Its totient is φ = 142101822580.

The previous prime is 142101822523. The next prime is 142101822601. The reversal of 142101822581 is 185228101241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137517855556 + 4583967025 = 370834^2 + 67705^2 .

It is a cyclic number.

It is not a de Polignac number, because 142101822581 - 2³⁰ = 141028080757 is a prime.

It is a super-2 number, since 2×142101822581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142101822481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71050911290 + 71050911291.

It is an arithmetic number, because the mean of its divisors is an integer number (71050911291).

Almost surely, 2^142101822581 is an apocalyptic number.

It is an amenable number.

142101822581 is a deficient number, since it is larger than the sum of its proper divisors (1).

142101822581 is an equidigital number, since it uses as much as digits as its factorization.

142101822581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10240, while the sum is 35.

The spelling of 142101822581 in words is "one hundred forty-two billion, one hundred one million, eight hundred twenty-two thousand, five hundred eighty-one".