20100111212101 has 64 divisors (see below), whose sum is σ = 21713577984000. Its totient is φ = 18561739680000.

The previous prime is 20100111212059. The next prime is 20100111212141. The reversal of 20100111212101 is 10121211100102.

It is a happy number.

It is not a de Polignac number, because 20100111212101 - 2³⁹ = 19550355398213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100111212141) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21871720120 + ... + 21871721038.

It is an arithmetic number, because the mean of its divisors is an integer number (339274656000).

Almost surely, 2^{20100111212101} is an apocalyptic number.

It is an amenable number.

20100111212101 is a deficient number, since it is larger than the sum of its proper divisors (1613466771899).

20100111212101 is a wasteful number, since it uses less digits than its factorization.

20100111212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1930.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20100111212101 its reverse (10121211100102), we get a palindrome (30221322312203).

The spelling of 20100111212101 in words is "twenty trillion, one hundred billion, one hundred eleven million, two hundred twelve thousand, one hundred one".