2021012220111 has 4 divisors (see below), whose sum is σ = 2694682960152. Its totient is φ = 1347341480072.

The previous prime is 2021012220109. The next prime is 2021012220163. The reversal of 2021012220111 is 1110222101202.

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 2021012220111 - 2¹ = 2021012220109 is a prime.

It is a super-2 number, since 2×2021012220111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021012220191) 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, 336835370016 + ... + 336835370021.

It is an arithmetic number, because the mean of its divisors is an integer number (673670740038).

Almost surely, 2^{2021012220111} is an apocalyptic number.

2021012220111 is a deficient number, since it is larger than the sum of its proper divisors (673670740041).

2021012220111 is an equidigital number, since it uses as much as digits as its factorization.

2021012220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673670740040.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2021012220111 its reverse (1110222101202), we get a palindrome (3131234321313).

The spelling of 2021012220111 in words is "two trillion, twenty-one billion, twelve million, two hundred twenty thousand, one hundred eleven".