1002120003 has 6 divisors (see below), whose sum is σ = 1447506684. Its totient is φ = 668079996.

The previous prime is 1002119999. The next prime is 1002120019. The reversal of 1002120003 is 3000212001.

It is a happy number.

It is not a de Polignac number, because 1002120003 - 2² = 1002119999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 111346667 = 1002120003 / (1 + 0 + 0 + 2 + 1 + 2 + 0 + 0 + 0 + 3).

It is not an unprimeable number, because it can be changed into a prime (1002120103) 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 5 ways as a sum of consecutive naturals, for example, 55673325 + ... + 55673342.

It is an arithmetic number, because the mean of its divisors is an integer number (241251114).

Almost surely, 2^1002120003 is an apocalyptic number.

1002120003 is a deficient number, since it is larger than the sum of its proper divisors (445386681).

1002120003 is a wasteful number, since it uses less digits than its factorization.

1002120003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111346673 (or 111346670 counting only the distinct ones).

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

The square root of 1002120003 is about 31656.2790453963. The cubic root of 1002120003 is about 1000.7061688748.

Adding to 1002120003 its reverse (3000212001), we get a palindrome (4002332004).

The spelling of 1002120003 in words is "one billion, two million, one hundred twenty thousand, three".