2021022011 has 4 divisors (see below), whose sum is σ = 2021250000. Its totient is φ = 2020794024.

The previous prime is 2021022007. The next prime is 2021022013. The reversal of 2021022011 is 1102201202.

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 2021022011 - 2² = 2021022007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021021983 and 2021022001.

It is not an unprimeable number, because it can be changed into a prime (2021022013) 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, 100136 + ... + 118613.

It is an arithmetic number, because the mean of its divisors is an integer number (505312500).

Almost surely, 2^2021022011 is an apocalyptic number.

2021022011 is a deficient number, since it is larger than the sum of its proper divisors (227989).

2021022011 is an equidigital number, since it uses as much as digits as its factorization.

2021022011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227988.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2021022011 is about 44955.7783938839. The cubic root of 2021022011 is about 1264.3200188731.

Adding to 2021022011 its reverse (1102201202), we get a palindrome (3123223213).

The spelling of 2021022011 in words is "two billion, twenty-one million, twenty-two thousand, eleven".