2021101021211 has 4 divisors (see below), whose sum is σ = 2021192400792. Its totient is φ = 2021009641632.

The previous prime is 2021101021157. The next prime is 2021101021229. The reversal of 2021101021211 is 1121201011202.

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 2021101021211 - 2¹⁴ = 2021101004827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021101021241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45656606 + ... + 45700851.

It is an arithmetic number, because the mean of its divisors is an integer number (505298100198).

Almost surely, 2^{2021101021211} is an apocalyptic number.

2021101021211 is a deficient number, since it is larger than the sum of its proper divisors (91379581).

2021101021211 is an equidigital number, since it uses as much as digits as its factorization.

2021101021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91379580.

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

Adding to 2021101021211 its reverse (1121201011202), we get a palindrome (3142302032413).

The spelling of 2021101021211 in words is "two trillion, twenty-one billion, one hundred one million, twenty-one thousand, two hundred eleven".