2001113020381 has 2 divisors, whose sum is σ = 2001113020382. Its totient is φ = 2001113020380.

The previous prime is 2001113020327. The next prime is 2001113020409. The reversal of 2001113020381 is 1830203111002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1064023195225 + 937089825156 = 1031515^2 + 968034^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001113020381 is a prime.

It is a super-2 number, since 2×2001113020381² (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 (2001113020481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000556510190 + 1000556510191.

It is an arithmetic number, because the mean of its divisors is an integer number (1000556510191).

Almost surely, 2^{2001113020381} is an apocalyptic number.

It is an amenable number.

2001113020381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001113020381 is an equidigital number, since it uses as much as digits as its factorization.

2001113020381 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 22.

Adding to 2001113020381 its reverse (1830203111002), we get a palindrome (3831316131383).

The spelling of 2001113020381 in words is "two trillion, one billion, one hundred thirteen million, twenty thousand, three hundred eighty-one".