1200103021123 has 4 divisors (see below), whose sum is σ = 1200545702928. Its totient is φ = 1199660339320.

The previous prime is 1200103021121. The next prime is 1200103021153. The reversal of 1200103021123 is 3211203010021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1200103021123 - 2¹ = 1200103021121 is a prime.

It is a super-2 number, since 2×1200103021123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200103021097 and 1200103021106.

It is not an unprimeable number, because it can be changed into a prime (1200103021121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221336836 + ... + 221342257.

It is an arithmetic number, because the mean of its divisors is an integer number (300136425732).

Almost surely, 2^{1200103021123} is an apocalyptic number.

1200103021123 is a deficient number, since it is larger than the sum of its proper divisors (442681805).

1200103021123 is an equidigital number, since it uses as much as digits as its factorization.

1200103021123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442681804.

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

Adding to 1200103021123 its reverse (3211203010021), we get a palindrome (4411306031144).

The spelling of 1200103021123 in words is "one trillion, two hundred billion, one hundred three million, twenty-one thousand, one hundred twenty-three".