142055121161 has 2 divisors, whose sum is σ = 142055121162. Its totient is φ = 142055121160.

The previous prime is 142055121113. The next prime is 142055121179. The reversal of 142055121161 is 161121550241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139562016400 + 2493104761 = 373580^2 + 49931^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142055121161 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (142055121101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71027560580 + 71027560581.

It is an arithmetic number, because the mean of its divisors is an integer number (71027560581).

Almost surely, 2^142055121161 is an apocalyptic number.

It is an amenable number.

142055121161 is a deficient number, since it is larger than the sum of its proper divisors (1).

142055121161 is an equidigital number, since it uses as much as digits as its factorization.

142055121161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 29.

The spelling of 142055121161 in words is "one hundred forty-two billion, fifty-five million, one hundred twenty-one thousand, one hundred sixty-one".