2121100111101 has 8 divisors (see below), whose sum is σ = 2828141907424. Its totient is φ = 1414062527760.

The previous prime is 2121100111079. The next prime is 2121100111129. The reversal of 2121100111101 is 1011110011212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2121100111101 - 2²⁵ = 2121066556669 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 (2121100111181) 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, 413190 + ... + 2100696.

It is an arithmetic number, because the mean of its divisors is an integer number (353517738428).

Almost surely, 2^{2121100111101} is an apocalyptic number.

It is an amenable number.

2121100111101 is a deficient number, since it is larger than the sum of its proper divisors (707041796323).

2121100111101 is a wasteful number, since it uses less digits than its factorization.

2121100111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106491.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 2121100111101 its reverse (1011110011212), we get a palindrome (3132210122313).

The spelling of 2121100111101 in words is "two trillion, one hundred twenty-one billion, one hundred million, one hundred eleven thousand, one hundred one".