2021111122011 has 4 divisors (see below), whose sum is σ = 2694814829352. Its totient is φ = 1347407414672.

The previous prime is 2021111121983. The next prime is 2021111122021. The reversal of 2021111122011 is 1102211111202.

It is a happy number.

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 2021111122011 - 2²⁷ = 2020976904283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2021111122021) 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, 336851853666 + ... + 336851853671.

It is an arithmetic number, because the mean of its divisors is an integer number (673703707338).

Almost surely, 2^{2021111122011} is an apocalyptic number.

2021111122011 is a deficient number, since it is larger than the sum of its proper divisors (673703707341).

2021111122011 is an equidigital number, since it uses as much as digits as its factorization.

2021111122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673703707340.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2021111122011 its reverse (1102211111202), we get a palindrome (3123322233213).

The spelling of 2021111122011 in words is "two trillion, twenty-one billion, one hundred eleven million, one hundred twenty-two thousand, eleven".