20011112101001 has 16 divisors (see below), whose sum is σ = 23035177979520. Its totient is φ = 17028388736640.

The previous prime is 20011112100977. The next prime is 20011112101007. The reversal of 20011112101001 is 10010121111002.

It is a cyclic number.

It is not a de Polignac number, because 20011112101001 - 2¹⁸ = 20011111838857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20011112101007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28730075 + ... + 29418351.

It is an arithmetic number, because the mean of its divisors is an integer number (1439698623720).

Almost surely, 2^{20011112101001} is an apocalyptic number.

It is an amenable number.

20011112101001 is a deficient number, since it is larger than the sum of its proper divisors (3024065878519).

20011112101001 is a wasteful number, since it uses less digits than its factorization.

20011112101001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718304.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 20011112101001 its reverse (10010121111002), we get a palindrome (30021233212003).

The spelling of 20011112101001 in words is "twenty trillion, eleven billion, one hundred twelve million, one hundred one thousand, one".