1002120002381 has 2 divisors, whose sum is σ = 1002120002382. Its totient is φ = 1002120002380.

The previous prime is 1002120002341. The next prime is 1002120002431. The reversal of 1002120002381 is 1832000212001.

1002120002381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 921993642025 + 80126360356 = 960205^2 + 283066^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002120002381 is a prime.

It is a super-2 number, since 2×1002120002381² (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 (1002120002311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501060001190 + 501060001191.

It is an arithmetic number, because the mean of its divisors is an integer number (501060001191).

Almost surely, 2^{1002120002381} is an apocalyptic number.

It is an amenable number.

1002120002381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002120002381 is an equidigital number, since it uses as much as digits as its factorization.

1002120002381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1002120002381 its reverse (1832000212001), we get a palindrome (2834120214382).

The spelling of 1002120002381 in words is "one trillion, two billion, one hundred twenty million, two thousand, three hundred eighty-one".