2021111021211 has 16 divisors (see below), whose sum is σ = 2706242601216. Its totient is φ = 1341704634336.

The previous prime is 2021111021207. The next prime is 2021111021261. The reversal of 2021111021211 is 1121201111202.

It is a happy number.

It is not a de Polignac number, because 2021111021211 - 2² = 2021111021207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2021111021261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 684975 + ... + 2124008.

It is an arithmetic number, because the mean of its divisors is an integer number (169140162576).

Almost surely, 2^{2021111021211} is an apocalyptic number.

2021111021211 is a deficient number, since it is larger than the sum of its proper divisors (685131580005).

2021111021211 is a wasteful number, since it uses less digits than its factorization.

2021111021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2810002.

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

Adding to 2021111021211 its reverse (1121201111202), we get a palindrome (3142312132413).

The spelling of 2021111021211 in words is "two trillion, twenty-one billion, one hundred eleven million, twenty-one thousand, two hundred eleven".