2001011203 has 2 divisors, whose sum is σ = 2001011204. Its totient is φ = 2001011202.

The previous prime is 2001011161. The next prime is 2001011251. The reversal of 2001011203 is 3021101002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001011203 - 2⁹ = 2001010691 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2001011203.

It is not a weakly prime, because it can be changed into another prime (2001011263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000505601 + 1000505602.

It is an arithmetic number, because the mean of its divisors is an integer number (1000505602).

Almost surely, 2^2001011203 is an apocalyptic number.

2001011203 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001011203 is an equidigital number, since it uses as much as digits as its factorization.

2001011203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 2001011203 is about 44732.6637145610. The cubic root of 2001011203 is about 1260.1333534428.

Adding to 2001011203 its reverse (3021101002), we get a palindrome (5022112205).

It can be divided in two parts, 20010 and 11203, that added together give a palindrome (31213).

The spelling of 2001011203 in words is "two billion, one million, eleven thousand, two hundred three".