203020323121211 has 4 divisors (see below), whose sum is σ = 203020387957752. Its totient is φ = 203020258284672.

The previous prime is 203020323121171. The next prime is 203020323121223. The reversal of 203020323121211 is 112121323020302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203020323121211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203020323121711) 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, 27469565 + ... + 34067838.

It is an arithmetic number, because the mean of its divisors is an integer number (50755096989438).

Almost surely, 2^{203020323121211} is an apocalyptic number.

203020323121211 is a deficient number, since it is larger than the sum of its proper divisors (64836541).

203020323121211 is an equidigital number, since it uses as much as digits as its factorization.

203020323121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64836540.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 203020323121211 its reverse (112121323020302), we get a palindrome (315141646141513).

The spelling of 203020323121211 in words is "two hundred three trillion, twenty billion, three hundred twenty-three million, one hundred twenty-one thousand, two hundred eleven".