2021021123 has 8 divisors (see below), whose sum is σ = 2220845040. Its totient is φ = 1823879680.

The previous prime is 2021021117. The next prime is 2021021131. The reversal of 2021021123 is 3211201202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2021021123 - 2⁶ = 2021021059 is a prime.

It is a super-2 number, since 2×2021021123² = 8169052759224362258, 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 = 2021021098 and 2021021107.

It is not an unprimeable number, because it can be changed into a prime (2021011123) 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 7 ways as a sum of consecutive naturals, for example, 669038 + ... + 672051.

It is an arithmetic number, because the mean of its divisors is an integer number (277605630).

Almost surely, 2^2021021123 is an apocalyptic number.

2021021123 is a deficient number, since it is larger than the sum of its proper divisors (199823917).

2021021123 is a wasteful number, since it uses less digits than its factorization.

2021021123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341237.

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

The square root of 2021021123 is about 44955.7685175106. The cubic root of 2021021123 is about 1264.3198337001.

Adding to 2021021123 its reverse (3211201202), we get a palindrome (5232222325).

The spelling of 2021021123 in words is "two billion, twenty-one million, twenty-one thousand, one hundred twenty-three".