1321100232003 has 6 divisors (see below), whose sum is σ = 1908255890684. Its totient is φ = 880733487996.

The previous prime is 1321100231999. The next prime is 1321100232031. The reversal of 1321100232003 is 3002320011231.

It is not a de Polignac number, because 1321100232003 - 2² = 1321100231999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321100232083) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73394457325 + ... + 73394457342.

Almost surely, 2^{1321100232003} is an apocalyptic number.

1321100232003 is a deficient number, since it is larger than the sum of its proper divisors (587155658681).

1321100232003 is a wasteful number, since it uses less digits than its factorization.

1321100232003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146788914673 (or 146788914670 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 1321100232003 its reverse (3002320011231), we get a palindrome (4323420243234).

The spelling of 1321100232003 in words is "one trillion, three hundred twenty-one billion, one hundred million, two hundred thirty-two thousand, three".