2021221023 has 16 divisors (see below), whose sum is σ = 2706487680. Its totient is φ = 1341730656.

The previous prime is 2021221021. The next prime is 2021221039. The reversal of 2021221023 is 3201221202.

It is a happy number.

It is not a de Polignac number, because 2021221023 - 2¹ = 2021221021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021220993 and 2021221011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021221021) 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, 996136 + ... + 998162.

It is an arithmetic number, because the mean of its divisors is an integer number (169155480).

Almost surely, 2^2021221023 is an apocalyptic number.

2021221023 is a deficient number, since it is larger than the sum of its proper divisors (685266657).

2021221023 is a wasteful number, since it uses less digits than its factorization.

2021221023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3286.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2021221023 is about 44957.9917589743. The cubic root of 2021221023 is about 1264.3615171177.

Adding to 2021221023 its reverse (3201221202), we get a palindrome (5222442225).

The spelling of 2021221023 in words is "two billion, twenty-one million, two hundred twenty-one thousand, twenty-three".