2021123 has 8 divisors (see below), whose sum is σ = 2198448. Its totient is φ = 1846944.

The previous prime is 2021119. The next prime is 2021137. The reversal of 2021123 is 3211202.

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 2021123 - 2² = 2021119 is a prime.

It is a super-2 number, since 2×2021123² = 8169876362258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665 + ... + 2117.

It is an arithmetic number, because the mean of its divisors is an integer number (274806).

2^2021123 is an apocalyptic number.

2021123 is a deficient number, since it is larger than the sum of its proper divisors (177325).

2021123 is a wasteful number, since it uses less digits than its factorization.

2021123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2021123 is about 1421.6620554829. The cubic root of 2021123 is about 126.4341077573.

Adding to 2021123 its reverse (3211202), we get a palindrome (5232325).

The spelling of 2021123 in words is "two million, twenty-one thousand, one hundred twenty-three".