20121111203 has 8 divisors (see below), whose sum is σ = 20731076928. Its totient is φ = 19518722944.

The previous prime is 20121111191. The next prime is 20121111221. The reversal of 20121111203 is 30211112102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20121111203 - 2⁴ = 20121111187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121111233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1888976 + ... + 1899597.

It is an arithmetic number, because the mean of its divisors is an integer number (2591384616).

Almost surely, 2^20121111203 is an apocalyptic number.

20121111203 is a deficient number, since it is larger than the sum of its proper divisors (609965725).

20121111203 is a wasteful number, since it uses less digits than its factorization.

20121111203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3788733.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20121111203 its reverse (30211112102), we get a palindrome (50332223305).

The spelling of 20121111203 in words is "twenty billion, one hundred twenty-one million, one hundred eleven thousand, two hundred three".