1000203120 has 320 divisors, whose sum is σ = 3989744640. Its totient is φ = 225580032.

The previous prime is 1000203119. The next prime is 1000203157. The reversal of 1000203120 is 213020001.

It is a happy number.

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

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1254562 + ... + 1255358.

It is an arithmetic number, because the mean of its divisors is an integer number (12467952).

Almost surely, 2^1000203120 is an apocalyptic number.

1000203120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1000203120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1994872320).

1000203120 is an abundant number, since it is smaller than the sum of its proper divisors (2989541520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1000203120 is a wasteful number, since it uses less digits than its factorization.

1000203120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909 (or 897 counting only the distinct ones).

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

The square root of 1000203120 is about 31625.9880478065. The cubic root of 1000203120 is about 1000.0677020830.

Adding to 1000203120 its reverse (213020001), we get a palindrome (1213223121).

The spelling of 1000203120 in words is "one billion, two hundred three thousand, one hundred twenty".