2021121223 has 16 divisors (see below), whose sum is σ = 2216816640. Its totient is φ = 1827453600.

The previous prime is 2021121209. The next prime is 2021121233. The reversal of 2021121223 is 3221211202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2021121223 - 2⁵ = 2021121191 is a prime.

It is a super-2 number, since 2×2021121223² = 8169861996122031458, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021121197 and 2021121206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021121233) 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, 2810658 + ... + 2811376.

It is an arithmetic number, because the mean of its divisors is an integer number (138551040).

Almost surely, 2^2021121223 is an apocalyptic number.

2021121223 is a deficient number, since it is larger than the sum of its proper divisors (195695417).

2021121223 is a wasteful number, since it uses less digits than its factorization.

2021121223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2021121223 is about 44956.8818202508. The cubic root of 2021121223 is about 1264.3407070307.

Adding to 2021121223 its reverse (3221211202), we get a palindrome (5242332425).

The spelling of 2021121223 in words is "two billion, twenty-one million, one hundred twenty-one thousand, two hundred twenty-three".