1001203210123 has 2 divisors, whose sum is σ = 1001203210124. Its totient is φ = 1001203210122.

The previous prime is 1001203210039. The next prime is 1001203210169. The reversal of 1001203210123 is 3210123021001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001203210123 - 2³⁷ = 863764256651 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1001203210097 and 1001203210106.

It is not a weakly prime, because it can be changed into another prime (1001203210193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500601605061 + 500601605062.

It is an arithmetic number, because the mean of its divisors is an integer number (500601605062).

Almost surely, 2^{1001203210123} is an apocalyptic number.

1001203210123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001203210123 is an equidigital number, since it uses as much as digits as its factorization.

1001203210123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1001203210123 its reverse (3210123021001), we get a palindrome (4211326231124).

The spelling of 1001203210123 in words is "one trillion, one billion, two hundred three million, two hundred ten thousand, one hundred twenty-three".