203120001211 has 4 divisors (see below), whose sum is σ = 208074147624. Its totient is φ = 198165854800.

The previous prime is 203120001199. The next prime is 203120001229. The reversal of 203120001211 is 112100021302.

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 203120001211 - 2⁵ = 203120001179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203120001191 and 203120001200.

It is not an unprimeable number, because it can be changed into a prime (203120001281) 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, 2477073145 + ... + 2477073226.

It is an arithmetic number, because the mean of its divisors is an integer number (52018536906).

Almost surely, 2^203120001211 is an apocalyptic number.

203120001211 is a deficient number, since it is larger than the sum of its proper divisors (4954146413).

203120001211 is an equidigital number, since it uses as much as digits as its factorization.

203120001211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4954146412.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 203120001211 its reverse (112100021302), we get a palindrome (315220022513).

The spelling of 203120001211 in words is "two hundred three billion, one hundred twenty million, one thousand, two hundred eleven".