1002002110981 has 2 divisors, whose sum is σ = 1002002110982. Its totient is φ = 1002002110980.

The previous prime is 1002002110951. The next prime is 1002002111003. The reversal of 1002002110981 is 1890112002001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 638864504100 + 363137606881 = 799290^2 + 602609^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002002110981 - 2⁹ = 1002002110469 is a prime.

It is a super-2 number, since 2×1002002110981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002002110951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501001055490 + 501001055491.

It is an arithmetic number, because the mean of its divisors is an integer number (501001055491).

Almost surely, 2^{1002002110981} is an apocalyptic number.

It is an amenable number.

1002002110981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002002110981 is an equidigital number, since it uses as much as digits as its factorization.

1002002110981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

Adding to 1002002110981 its reverse (1890112002001), we get a palindrome (2892114112982).

The spelling of 1002002110981 in words is "one trillion, two billion, two million, one hundred ten thousand, nine hundred eighty-one".