1323121000003 has 16 divisors (see below), whose sum is σ = 1528705924704. Its totient is φ = 1131789519360.

The previous prime is 1323120999883. The next prime is 1323121000013. The reversal of 1323121000003 is 3000001213231.

It is not a de Polignac number, because 1323121000003 - 2¹⁷ = 1323120868931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1323121000013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187500 + ... + 1637497.

It is an arithmetic number, because the mean of its divisors is an integer number (95544120294).

Almost surely, 2^{1323121000003} is an apocalyptic number.

1323121000003 is a deficient number, since it is larger than the sum of its proper divisors (205584924701).

1323121000003 is a wasteful number, since it uses less digits than its factorization.

1323121000003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828902.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 1323121000003 its reverse (3000001213231), we get a palindrome (4323122213234).

The spelling of 1323121000003 in words is "one trillion, three hundred twenty-three billion, one hundred twenty-one million, three", and thus it is an aban number.