2021001211211 has 4 divisors (see below), whose sum is σ = 2021279861952. Its totient is φ = 2020722560472.

The previous prime is 2021001211157. The next prime is 2021001211241. The reversal of 2021001211211 is 1121121001202.

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 2021001211211 - 2¹⁸ = 2021000949067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021001211241) 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, 139314491 + ... + 139328996.

It is an arithmetic number, because the mean of its divisors is an integer number (505319965488).

Almost surely, 2^{2021001211211} is an apocalyptic number.

2021001211211 is a deficient number, since it is larger than the sum of its proper divisors (278650741).

2021001211211 is an equidigital number, since it uses as much as digits as its factorization.

2021001211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278650740.

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

Adding to 2021001211211 its reverse (1121121001202), we get a palindrome (3142122212413).

The spelling of 2021001211211 in words is "two trillion, twenty-one billion, one million, two hundred eleven thousand, two hundred eleven".