121212303203 has 4 divisors (see below), whose sum is σ = 123266749080. Its totient is φ = 119157857328.

The previous prime is 121212303193. The next prime is 121212303227. The reversal of 121212303203 is 302303212121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 302303212121 = 210191 ⋅1438231.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121212303203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121212303103) 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, 1027222850 + ... + 1027222967.

It is an arithmetic number, because the mean of its divisors is an integer number (30816687270).

Almost surely, 2^121212303203 is an apocalyptic number.

121212303203 is a deficient number, since it is larger than the sum of its proper divisors (2054445877).

121212303203 is an equidigital number, since it uses as much as digits as its factorization.

121212303203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054445876.

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

Adding to 121212303203 its reverse (302303212121), we get a palindrome (423515515324).

The spelling of 121212303203 in words is "one hundred twenty-one billion, two hundred twelve million, three hundred three thousand, two hundred three".