1020001203 has 12 divisors (see below), whose sum is σ = 1586668720. Its totient is φ = 627692976.

The previous prime is 1020001201. The next prime is 1020001223. The reversal of 1020001203 is 3021000201.

It is a happy number.

It is not a de Polignac number, because 1020001203 - 2¹ = 1020001201 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1020001201) 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, 4358863 + ... + 4359096.

Almost surely, 2^1020001203 is an apocalyptic number.

1020001203 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1020001203 is a deficient number, since it is larger than the sum of its proper divisors (566667517).

1020001203 is a wasteful number, since it uses less digits than its factorization.

1020001203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8717978 (or 8717975 counting only the distinct ones).

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

The square root of 1020001203 is about 31937.4576790326. The cubic root of 1020001203 is about 1006.6231053008.

Adding to 1020001203 its reverse (3021000201), we get a palindrome (4041001404).

The spelling of 1020001203 in words is "one billion, twenty million, one thousand, two hundred three".