1000021000203 has 12 divisors (see below), whose sum is σ = 1464262104760. Its totient is φ = 657548054496.

The previous prime is 1000021000129. The next prime is 1000021000207. The reversal of 1000021000203 is 3020001200001.

It is a happy number.

It is not a de Polignac number, because 1000021000203 - 2²⁸ = 999752564747 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000021000207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 761050333 + ... + 761051646.

Almost surely, 2^{1000021000203} is an apocalyptic number.

1000021000203 is a deficient number, since it is larger than the sum of its proper divisors (464241104557).

1000021000203 is a wasteful number, since it uses less digits than its factorization.

1000021000203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522102058 (or 1522102055 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 1000021000203 its reverse (3020001200001), we get a palindrome (4020022200204).

The spelling of 1000021000203 in words is "one trillion, twenty-one million, two hundred three", and thus it is an aban number.