1000203123331 has 12 divisors (see below), whose sum is σ = 1117711106712. Its totient is φ = 891821974464.

The previous prime is 1000203123323. The next prime is 1000203123421. The reversal of 1000203123331 is 1333213020001.

It is not a de Polignac number, because 1000203123331 - 2³ = 1000203123323 is a prime.

It is a super-2 number, since 2×1000203123331² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000203123299 and 1000203123308.

It is not an unprimeable number, because it can be changed into a prime (1000203123131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81483445 + ... + 81495718.

It is an arithmetic number, because the mean of its divisors is an integer number (93142592226).

Almost surely, 2^{1000203123331} is an apocalyptic number.

1000203123331 is a deficient number, since it is larger than the sum of its proper divisors (117507983381).

1000203123331 is a wasteful number, since it uses less digits than its factorization.

1000203123331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162979218 (or 162979199 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 1000203123331 its reverse (1333213020001), we get a palindrome (2333416143332).

The spelling of 1000203123331 in words is "one trillion, two hundred three million, one hundred twenty-three thousand, three hundred thirty-one".