2111300020021 has 4 divisors (see below), whose sum is σ = 2111898634272. Its totient is φ = 2110701405772.

The previous prime is 2111300020009. The next prime is 2111300020033. The reversal of 2111300020021 is 1200200031112.

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 an interprime number because it is at equal distance from previous prime (2111300020009) and next prime (2111300020033).

It is a cyclic number.

It is not a de Polignac number, because 2111300020021 - 2¹¹ = 2111300017973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111300019983 and 2111300020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111300020051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299301835 + ... + 299308888.

It is an arithmetic number, because the mean of its divisors is an integer number (527974658568).

Almost surely, 2^{2111300020021} is an apocalyptic number.

It is an amenable number.

2111300020021 is a deficient number, since it is larger than the sum of its proper divisors (598614251).

2111300020021 is an equidigital number, since it uses as much as digits as its factorization.

2111300020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598614250.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 2111300020021 its reverse (1200200031112), we get a palindrome (3311500051133).

The spelling of 2111300020021 in words is "two trillion, one hundred eleven billion, three hundred million, twenty thousand, twenty-one".