20111121303 has 48 divisors (see below), whose sum is σ = 34500221280. Its totient is φ = 10321323264.

The previous prime is 20111121301. The next prime is 20111121323. The reversal of 20111121303 is 30312111102.

It is a happy number.

It is not a de Polignac number, because 20111121303 - 2¹ = 20111121301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111121301) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 71508 + ... + 212921.

It is an arithmetic number, because the mean of its divisors is an integer number (718754610).

Almost surely, 2^20111121303 is an apocalyptic number.

20111121303 is a deficient number, since it is larger than the sum of its proper divisors (14389099977).

20111121303 is a wasteful number, since it uses less digits than its factorization.

20111121303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284496 (or 284489 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 20111121303 its reverse (30312111102), we get a palindrome (50423232405).

The spelling of 20111121303 in words is "twenty billion, one hundred eleven million, one hundred twenty-one thousand, three hundred three".