121002003123 has 4 divisors (see below), whose sum is σ = 161336004168. Its totient is φ = 80668002080.

The previous prime is 121002003091. The next prime is 121002003223. The reversal of 121002003123 is 321300200121.

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 121002003123 - 2⁵ = 121002003091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121002003223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20167000518 + ... + 20167000523.

It is an arithmetic number, because the mean of its divisors is an integer number (40334001042).

Almost surely, 2^121002003123 is an apocalyptic number.

121002003123 is a deficient number, since it is larger than the sum of its proper divisors (40334001045).

121002003123 is an equidigital number, since it uses as much as digits as its factorization.

121002003123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40334001044.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 121002003123 its reverse (321300200121), we get a palindrome (442302203244).

The spelling of 121002003123 in words is "one hundred twenty-one billion, two million, three thousand, one hundred twenty-three".