20130311111 has 8 divisors (see below), whose sum is σ = 21030645600. Its totient is φ = 19243722400.

The previous prime is 20130311101. The next prime is 20130311129. The reversal of 20130311111 is 11111303102.

It is a happy number.

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 20130311111 - 2³⁴ = 2950441927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20130311101) 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, 3433451 + ... + 3439308.

It is an arithmetic number, because the mean of its divisors is an integer number (2628830700).

Almost surely, 2^20130311111 is an apocalyptic number.

20130311111 is a deficient number, since it is larger than the sum of its proper divisors (900334489).

20130311111 is a wasteful number, since it uses less digits than its factorization.

20130311111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6872889.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 20130311111 its reverse (11111303102), we get a palindrome (31241614213).

The spelling of 20130311111 in words is "twenty billion, one hundred thirty million, three hundred eleven thousand, one hundred eleven".