1001201000203 has 2 divisors, whose sum is σ = 1001201000204. Its totient is φ = 1001201000202.

The previous prime is 1001201000119. The next prime is 1001201000243. The reversal of 1001201000203 is 3020001021001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001201000203 - 2²¹ = 1001198903051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1001201000203.

It is not a weakly prime, because it can be changed into another prime (1001201000243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500600500101 + 500600500102.

It is an arithmetic number, because the mean of its divisors is an integer number (500600500102).

Almost surely, 2^{1001201000203} is an apocalyptic number.

1001201000203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001201000203 is an equidigital number, since it uses as much as digits as its factorization.

1001201000203 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.

Adding to 1001201000203 its reverse (3020001021001), we get a palindrome (4021202021204).

The spelling of 1001201000203 in words is "one trillion, one billion, two hundred one million, two hundred three", and thus it is an aban number.