1100012002381 has 2 divisors, whose sum is σ = 1100012002382. Its totient is φ = 1100012002380.

The previous prime is 1100012002217. The next prime is 1100012002399. The reversal of 1100012002381 is 1832002100011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 832784004900 + 267227997481 = 912570^2 + 516941^2 .

It is an emirp because it is prime and its reverse (1832002100011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1100012002381 is a prime.

It is a super-2 number, since 2×1100012002381² (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 (1100012005381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550006001190 + 550006001191.

It is an arithmetic number, because the mean of its divisors is an integer number (550006001191).

Almost surely, 2^{1100012002381} is an apocalyptic number.

It is an amenable number.

1100012002381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100012002381 is an equidigital number, since it uses as much as digits as its factorization.

1100012002381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1100012002381 its reverse (1832002100011), we get a palindrome (2932014102392).

The spelling of 1100012002381 in words is "one trillion, one hundred billion, twelve million, two thousand, three hundred eighty-one".