2211020111021 has 4 divisors (see below), whose sum is σ = 2264947430844. Its totient is φ = 2157092791200.

The previous prime is 2211020111017. The next prime is 2211020111081. The reversal of 2211020111021 is 1201110201122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1324812510025 + 886207600996 = 1151005^2 + 941386^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211020111021 - 2² = 2211020111017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211020110987 and 2211020111005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211020111081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26963659850 + ... + 26963659931.

It is an arithmetic number, because the mean of its divisors is an integer number (566236857711).

Almost surely, 2^{2211020111021} is an apocalyptic number.

It is an amenable number.

2211020111021 is a deficient number, since it is larger than the sum of its proper divisors (53927319823).

2211020111021 is an equidigital number, since it uses as much as digits as its factorization.

2211020111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53927319822.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2211020111021 its reverse (1201110201122), we get a palindrome (3412130312143).

The spelling of 2211020111021 in words is "two trillion, two hundred eleven billion, twenty million, one hundred eleven thousand, twenty-one".