20111130231 has 8 divisors (see below), whose sum is σ = 26815563504. Its totient is φ = 13407058560.

The previous prime is 20111130217. The next prime is 20111130233. The reversal of 20111130231 is 13203111102.

It is a happy number.

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

It is not a de Polignac number, because 20111130231 - 2¹⁹ = 20110605943 is a prime.

It is a super-2 number, since 2×20111130231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20111130231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111130233) 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, 91885 + ... + 220601.

It is an arithmetic number, because the mean of its divisors is an integer number (3351945438).

Almost surely, 2^20111130231 is an apocalyptic number.

20111130231 is a deficient number, since it is larger than the sum of its proper divisors (6704433273).

20111130231 is a wasteful number, since it uses less digits than its factorization.

20111130231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180801.

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

Adding to 20111130231 its reverse (13203111102), we get a palindrome (33314241333).

The spelling of 20111130231 in words is "twenty billion, one hundred eleven million, one hundred thirty thousand, two hundred thirty-one".