121123310103203 has 4 divisors (see below), whose sum is σ = 121536700240368. Its totient is φ = 120709919966040.

The previous prime is 121123310103139. The next prime is 121123310103251. The reversal of 121123310103203 is 302301013321121.

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 121123310103203 - 2⁶ = 121123310103139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121123310103283) 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, 206695068143 + ... + 206695068728.

It is an arithmetic number, because the mean of its divisors is an integer number (30384175060092).

Almost surely, 2^{121123310103203} is an apocalyptic number.

121123310103203 is a deficient number, since it is larger than the sum of its proper divisors (413390137165).

121123310103203 is an equidigital number, since it uses as much as digits as its factorization.

121123310103203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413390137164.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 121123310103203 its reverse (302301013321121), we get a palindrome (423424323424324).

The spelling of 121123310103203 in words is "one hundred twenty-one trillion, one hundred twenty-three billion, three hundred ten million, one hundred three thousand, two hundred three".