2002120006981 has 2 divisors, whose sum is σ = 2002120006982. Its totient is φ = 2002120006980.

The previous prime is 2002120006979. The next prime is 2002120007033. The reversal of 2002120006981 is 1896000212002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1805707062756 + 196412944225 = 1343766^2 + 443185^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002120006981 - 2¹ = 2002120006979 is a prime.

It is a super-2 number, since 2×2002120006981² (a number of 25 digits) contains 22 as substring.

Together with 2002120006979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2002120006181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001060003490 + 1001060003491.

It is an arithmetic number, because the mean of its divisors is an integer number (1001060003491).

Almost surely, 2^{2002120006981} is an apocalyptic number.

It is an amenable number.

2002120006981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002120006981 is an equidigital number, since it uses as much as digits as its factorization.

2002120006981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

Adding to 2002120006981 its reverse (1896000212002), we get a palindrome (3898120218983).

The spelling of 2002120006981 in words is "two trillion, two billion, one hundred twenty million, six thousand, nine hundred eighty-one".