210142432433981 has 2 divisors, whose sum is σ = 210142432433982. Its totient is φ = 210142432433980.

The previous prime is 210142432433977. The next prime is 210142432434029. The reversal of 210142432433981 is 189334234241012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209518127017081 + 624305416900 = 14474741^2 + 790130^2 .

It is a cyclic number.

It is not a de Polignac number, because 210142432433981 - 2² = 210142432433977 is a prime.

It is a super-2 number, since 2×210142432433981² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210142432433911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105071216216990 + 105071216216991.

It is an arithmetic number, because the mean of its divisors is an integer number (105071216216991).

Almost surely, 2^{210142432433981} is an apocalyptic number.

It is an amenable number.

210142432433981 is a deficient number, since it is larger than the sum of its proper divisors (1).

210142432433981 is an equidigital number, since it uses as much as digits as its factorization.

210142432433981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 47.

Adding to 210142432433981 its reverse (189334234241012), we get a palindrome (399476666674993).

The spelling of 210142432433981 in words is "two hundred ten trillion, one hundred forty-two billion, four hundred thirty-two million, four hundred thirty-three thousand, nine hundred eighty-one".