210002030981 has 2 divisors, whose sum is σ = 210002030982. Its totient is φ = 210002030980.

The previous prime is 210002030971. The next prime is 210002031049. The reversal of 210002030981 is 189030200012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202260670756 + 7741360225 = 449734^2 + 87985^2 .

It is a cyclic number.

It is not a de Polignac number, because 210002030981 - 2²⁶ = 209934922117 is a prime.

It is a super-2 number, since 2×210002030981² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 210002030981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210002030941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105001015490 + 105001015491.

It is an arithmetic number, because the mean of its divisors is an integer number (105001015491).

Almost surely, 2^210002030981 is an apocalyptic number.

It is an amenable number.

210002030981 is a deficient number, since it is larger than the sum of its proper divisors (1).

210002030981 is an equidigital number, since it uses as much as digits as its factorization.

210002030981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

Adding to 210002030981 its reverse (189030200012), we get a palindrome (399032230993).

The spelling of 210002030981 in words is "two hundred ten billion, two million, thirty thousand, nine hundred eighty-one".