2100012221011 has 4 divisors (see below), whose sum is σ = 2118596400072. Its totient is φ = 2081428041952.

The previous prime is 2100012220987. The next prime is 2100012221123. The reversal of 2100012221011 is 1101222100012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2100012221011 - 2⁹ = 2100012220499 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100012220982 and 2100012221000.

It is not an unprimeable number, because it can be changed into a prime (2100012221711) 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, 9292089361 + ... + 9292089586.

It is an arithmetic number, because the mean of its divisors is an integer number (529649100018).

Almost surely, 2^{2100012221011} is an apocalyptic number.

2100012221011 is a deficient number, since it is larger than the sum of its proper divisors (18584179061).

2100012221011 is a wasteful number, since it uses less digits than its factorization.

2100012221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18584179060.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2100012221011 its reverse (1101222100012), we get a palindrome (3201234321023).

The spelling of 2100012221011 in words is "two trillion, one hundred billion, twelve million, two hundred twenty-one thousand, eleven".