2021311223211 has 8 divisors (see below), whose sum is σ = 3080093292544. Its totient is φ = 1155034984680.

The previous prime is 2021311223093. The next prime is 2021311223231. The reversal of 2021311223211 is 1123221131202.

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

It is not a de Polignac number, because 2021311223211 - 2⁷ = 2021311223083 is a prime.

It is a super-2 number, since 2×2021311223211² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 96252915391 = 2021311223211 / (2 + 0 + 2 + 1 + 3 + 1 + 1 + 2 + 2 + 3 + 2 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021311223231) 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, 48126457675 + ... + 48126457716.

It is an arithmetic number, because the mean of its divisors is an integer number (385011661568).

Almost surely, 2^{2021311223211} is an apocalyptic number.

2021311223211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2021311223211 is a deficient number, since it is larger than the sum of its proper divisors (1058782069333).

2021311223211 is an equidigital number, since it uses as much as digits as its factorization.

2021311223211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96252915401.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 2021311223211 its reverse (1123221131202), we get a palindrome (3144532354413).

The spelling of 2021311223211 in words is "two trillion, twenty-one billion, three hundred eleven million, two hundred twenty-three thousand, two hundred eleven".