20110001003 has 2 divisors, whose sum is σ = 20110001004. Its totient is φ = 20110001002.

The previous prime is 20110000949. The next prime is 20110001011. The reversal of 20110001003 is 30010001102.

It is an a-pointer prime, because the next prime (20110001011) can be obtained adding 20110001003 to its sum of digits (8).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20110001003 - 2⁸ = 20110000747 is a prime.

It is a super-2 number, since 2×20110001003² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20110001053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055000501 + 10055000502.

It is an arithmetic number, because the mean of its divisors is an integer number (10055000502).

Almost surely, 2^20110001003 is an apocalyptic number.

20110001003 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110001003 is an equidigital number, since it uses as much as digits as its factorization.

20110001003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 8.

Adding to 20110001003 its reverse (30010001102), we get a palindrome (50120002105).

Subtracting 20110001003 from its reverse (30010001102), we obtain a palindrome (9900000099).

The spelling of 20110001003 in words is "twenty billion, one hundred ten million, one thousand, three".