20111112121331 has 48 divisors (see below), whose sum is σ = 26346721655808. Its totient is φ = 15164262590400.

The previous prime is 20111112121297. The next prime is 20111112121381. The reversal of 20111112121331 is 13312121111102.

It is not a de Polignac number, because 20111112121331 - 2³⁰ = 20110038379507 is a prime.

It is a super-2 number, since 2×20111112121331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111112121381) 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, 245297261 + ... + 245379233.

It is an arithmetic number, because the mean of its divisors is an integer number (548890034496).

Almost surely, 2^{20111112121331} is an apocalyptic number.

20111112121331 is a deficient number, since it is larger than the sum of its proper divisors (6235609534477).

20111112121331 is a wasteful number, since it uses less digits than its factorization.

20111112121331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96712 (or 96705 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 20111112121331 its reverse (13312121111102), we get a palindrome (33423233232433).

The spelling of 20111112121331 in words is "twenty trillion, one hundred eleven billion, one hundred twelve million, one hundred twenty-one thousand, three hundred thirty-one".