2100120001101 has 40 divisors (see below), whose sum is σ = 3322918494720. Its totient is φ = 1317262165632.

The previous prime is 2100120001051. The next prime is 2100120001127. The reversal of 2100120001101 is 1011000210012.

It is a happy number.

It is not a de Polignac number, because 2100120001101 - 2²⁹ = 2099583130189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100120003101) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3699510 + ... + 4229256.

It is an arithmetic number, because the mean of its divisors is an integer number (83072962368).

Almost surely, 2^{2100120001101} is an apocalyptic number.

It is an amenable number.

2100120001101 is a deficient number, since it is larger than the sum of its proper divisors (1222798493619).

2100120001101 is a wasteful number, since it uses less digits than its factorization.

2100120001101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532655 (or 532646 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 2100120001101 its reverse (1011000210012), we get a palindrome (3111120211113).

The spelling of 2100120001101 in words is "two trillion, one hundred billion, one hundred twenty million, one thousand, one hundred one".