2021022101 has 24 divisors (see below), whose sum is σ = 2494575360. Its totient is φ = 1626936192.

The previous prime is 2021022089. The next prime is 2021022109. The reversal of 2021022101 is 1012201202.

It is a happy number.

It is not a de Polignac number, because 2021022101 - 2¹⁸ = 2020759957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021022109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 433340 + ... + 437978.

It is an arithmetic number, because the mean of its divisors is an integer number (103940640).

Almost surely, 2^2021022101 is an apocalyptic number.

It is an amenable number.

2021022101 is a deficient number, since it is larger than the sum of its proper divisors (473553259).

2021022101 is a wasteful number, since it uses less digits than its factorization.

2021022101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5193 (or 5186 counting only the distinct ones).

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

The square root of 2021022101 is about 44955.7793948676. The cubic root of 2021022101 is about 1264.3200376407.

Adding to 2021022101 its reverse (1012201202), we get a palindrome (3033223303).

The spelling of 2021022101 in words is "two billion, twenty-one million, twenty-two thousand, one hundred one".