2111100212101 has 4 divisors (see below), whose sum is σ = 2222210749600. Its totient is φ = 1999989674604.

The previous prime is 2111100212077. The next prime is 2111100212107. The reversal of 2111100212101 is 1012120011112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2111100212101 - 2⁹ = 2111100211589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111100212107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55555268721 + ... + 55555268758.

It is an arithmetic number, because the mean of its divisors is an integer number (555552687400).

Almost surely, 2^{2111100212101} is an apocalyptic number.

It is an amenable number.

2111100212101 is a deficient number, since it is larger than the sum of its proper divisors (111110537499).

2111100212101 is a wasteful number, since it uses less digits than its factorization.

2111100212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111110537498.

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

Adding to 2111100212101 its reverse (1012120011112), we get a palindrome (3123220223213).

The spelling of 2111100212101 in words is "two trillion, one hundred eleven billion, one hundred million, two hundred twelve thousand, one hundred one".