20011012381 has 2 divisors, whose sum is σ = 20011012382. Its totient is φ = 20011012380.

The previous prime is 20011012379. The next prime is 20011012421. The reversal of 20011012381 is 18321011002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13937927481 + 6073084900 = 118059^2 + 77930^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011012381 - 2¹ = 20011012379 is a prime.

It is a super-2 number, since 2×20011012381² (a number of 21 digits) contains 22 as substring.

Together with 20011012379, 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 (20011010381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005506190 + 10005506191.

It is an arithmetic number, because the mean of its divisors is an integer number (10005506191).

Almost surely, 2^20011012381 is an apocalyptic number.

It is an amenable number.

20011012381 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011012381 is an equidigital number, since it uses as much as digits as its factorization.

20011012381 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 20011012381 its reverse (18321011002), we get a palindrome (38332023383).

The spelling of 20011012381 in words is "twenty billion, eleven million, twelve thousand, three hundred eighty-one".