20111112001 has 16 divisors (see below), whose sum is σ = 21369241600. Its totient is φ = 18873561168.

The previous prime is 20111111981. The next prime is 20111112023. The reversal of 20111112001 is 10021111102.

It is a cyclic number.

It is not a de Polignac number, because 20111112001 - 2¹³ = 20111103809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111112041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1214560 + ... + 1231006.

It is an arithmetic number, because the mean of its divisors is an integer number (1335577600).

Almost surely, 2^20111112001 is an apocalyptic number.

It is an amenable number.

20111112001 is a deficient number, since it is larger than the sum of its proper divisors (1258129599).

20111112001 is a wasteful number, since it uses less digits than its factorization.

20111112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17068.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20111112001 its reverse (10021111102), we get a palindrome (30132223103).

The spelling of 20111112001 in words is "twenty billion, one hundred eleven million, one hundred twelve thousand, one".