2021011111223 has 12 divisors (see below), whose sum is σ = 2223766758360. Its totient is φ = 1825856166192.

The previous prime is 2021011111213. The next prime is 2021011111237. The reversal of 2021011111223 is 3221111101202.

It is a happy number.

It is not a de Polignac number, because 2021011111223 - 2³² = 2016716143927 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 (2021011111213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35159693 + ... + 35217126.

It is an arithmetic number, because the mean of its divisors is an integer number (185313896530).

Almost surely, 2^{2021011111223} is an apocalyptic number.

2021011111223 is a deficient number, since it is larger than the sum of its proper divisors (202755647137).

2021011111223 is an equidigital number, since it uses as much as digits as its factorization.

2021011111223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70376926 (or 70376879 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 2021011111223 its reverse (3221111101202), we get a palindrome (5242122212425).

The spelling of 2021011111223 in words is "two trillion, twenty-one billion, eleven million, one hundred eleven thousand, two hundred twenty-three".