2021323101 has 16 divisors (see below), whose sum is σ = 3179470848. Its totient is φ = 1117782000.

The previous prime is 2021323093. The next prime is 2021323121. The reversal of 2021323101 is 1013231202.

It is not a de Polignac number, because 2021323101 - 2³ = 2021323093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021323121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1551825 + ... + 1553126.

It is an arithmetic number, because the mean of its divisors is an integer number (198716928).

Almost surely, 2^2021323101 is an apocalyptic number.

2021323101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2021323101 is a deficient number, since it is larger than the sum of its proper divisors (1158147747).

2021323101 is a wasteful number, since it uses less digits than its factorization.

2021323101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3104992.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2021323101 is about 44959.1270044248. The cubic root of 2021323101 is about 1264.3828014999.

Adding to 2021323101 its reverse (1013231202), we get a palindrome (3034554303).

The spelling of 2021323101 in words is "two billion, twenty-one million, three hundred twenty-three thousand, one hundred one".