121231230203 has 4 divisors (see below), whose sum is σ = 121236335640. Its totient is φ = 121226124768.

The previous prime is 121231230181. The next prime is 121231230233. The reversal of 121231230203 is 302032132121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 302032132121 = 487 ⋅620189183.

It is a cyclic number.

It is not a de Polignac number, because 121231230203 - 2⁶ = 121231230139 is a prime.

It is a super-2 number, since 2×121231230203² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121231230233) 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, 2516933 + ... + 2564646.

It is an arithmetic number, because the mean of its divisors is an integer number (30309083910).

Almost surely, 2^121231230203 is an apocalyptic number.

121231230203 is a deficient number, since it is larger than the sum of its proper divisors (5105437).

121231230203 is an equidigital number, since it uses as much as digits as its factorization.

121231230203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5105436.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 121231230203 its reverse (302032132121), we get a palindrome (423263362324).

The spelling of 121231230203 in words is "one hundred twenty-one billion, two hundred thirty-one million, two hundred thirty thousand, two hundred three".