20112111431 has 8 divisors (see below), whose sum is σ = 20546940480. Its totient is φ = 19681788672.

The previous prime is 20112111427. The next prime is 20112111433. The reversal of 20112111431 is 13411121102.

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 20112111431 - 2² = 20112111427 is a prime.

It is a super-2 number, since 2×20112111431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112111433) 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, 1117550 + ... + 1135403.

It is an arithmetic number, because the mean of its divisors is an integer number (2568367560).

Almost surely, 2^20112111431 is an apocalyptic number.

20112111431 is a deficient number, since it is larger than the sum of its proper divisors (434829049).

20112111431 is a wasteful number, since it uses less digits than its factorization.

20112111431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253145.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 20112111431 its reverse (13411121102), we get a palindrome (33523232533).

The spelling of 20112111431 in words is "twenty billion, one hundred twelve million, one hundred eleven thousand, four hundred thirty-one".