2021022211 has 4 divisors (see below), whose sum is σ = 2176485472. Its totient is φ = 1865558952.

The previous prime is 2021022197. The next prime is 2021022217. The reversal of 2021022211 is 1122201202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021022211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 155463247 = 2021022211 / (2 + 0 + 2 + 1 + 0 + 2 + 2 + 2 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021022191 and 2021022200.

It is not an unprimeable number, because it can be changed into a prime (2021022217) 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, 77731611 + ... + 77731636.

It is an arithmetic number, because the mean of its divisors is an integer number (544121368).

Almost surely, 2^2021022211 is an apocalyptic number.

2021022211 is a deficient number, since it is larger than the sum of its proper divisors (155463261).

2021022211 is a wasteful number, since it uses less digits than its factorization.

2021022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155463260.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2021022211 is about 44955.7806182920. The cubic root of 2021022211 is about 1264.3200605788.

Adding to 2021022211 its reverse (1122201202), we get a palindrome (3143223413).

The spelling of 2021022211 in words is "two billion, twenty-one million, twenty-two thousand, two hundred eleven".