2021223101 has 4 divisors (see below), whose sum is σ = 2049691104. Its totient is φ = 1992755100.

The previous prime is 2021223089. The next prime is 2021223107. The reversal of 2021223101 is 1013221202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2021223101 - 2¹⁴ = 2021206717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021223107) 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 3 ways as a sum of consecutive naturals, for example, 14233895 + ... + 14234036.

It is an arithmetic number, because the mean of its divisors is an integer number (512422776).

Almost surely, 2^2021223101 is an apocalyptic number.

It is an amenable number.

2021223101 is a deficient number, since it is larger than the sum of its proper divisors (28468003).

2021223101 is an equidigital number, since it uses as much as digits as its factorization.

2021223101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28468002.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2021223101 is about 44958.0148694312. The cubic root of 2021223101 is about 1264.3619504106.

Adding to 2021223101 its reverse (1013221202), we get a palindrome (3034444303).

The spelling of 2021223101 in words is "two billion, twenty-one million, two hundred twenty-three thousand, one hundred one".