20111112111001 has 8 divisors (see below), whose sum is σ = 20640618171360. Its totient is φ = 19588351351008.

The previous prime is 20111112110989. The next prime is 20111112111031. The reversal of 20111112111001 is 10011121111102.

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 20111112111001 - 2²¹ = 20111110013849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111112111031) 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, 1686319051 + ... + 1686330976.

It is an arithmetic number, because the mean of its divisors is an integer number (2580077271420).

Almost surely, 2^{20111112111001} is an apocalyptic number.

It is an amenable number.

20111112111001 is a deficient number, since it is larger than the sum of its proper divisors (529506060359).

20111112111001 is an equidigital number, since it uses as much as digits as its factorization.

20111112111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3372650183.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 20111112111001 its reverse (10011121111102), we get a palindrome (30122233222103).

The spelling of 20111112111001 in words is "twenty trillion, one hundred eleven billion, one hundred twelve million, one hundred eleven thousand, one".