142130531209 has 2 divisors, whose sum is σ = 142130531210. Its totient is φ = 142130531208.

The previous prime is 142130531183. The next prime is 142130531311. The reversal of 142130531209 is 902135031241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92656316025 + 49474215184 = 304395^2 + 222428^2 .

It is a cyclic number.

It is not a de Polignac number, because 142130531209 - 2³⁵ = 107770792841 is a prime.

It is not a weakly prime, because it can be changed into another prime (142130534209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71065265604 + 71065265605.

It is an arithmetic number, because the mean of its divisors is an integer number (71065265605).

Almost surely, 2^142130531209 is an apocalyptic number.

It is an amenable number.

142130531209 is a deficient number, since it is larger than the sum of its proper divisors (1).

142130531209 is an equidigital number, since it uses as much as digits as its factorization.

142130531209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The spelling of 142130531209 in words is "one hundred forty-two billion, one hundred thirty million, five hundred thirty-one thousand, two hundred nine".