2021020123 has 8 divisors (see below), whose sum is σ = 2050014960. Its totient is φ = 1992192000.

The previous prime is 2021020091. The next prime is 2021020147. The reversal of 2021020123 is 3210201202.

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 2021020123 - 2⁵ = 2021020091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021020223) 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, 17158 + ... + 65851.

It is an arithmetic number, because the mean of its divisors is an integer number (256251870).

Almost surely, 2^2021020123 is an apocalyptic number.

2021020123 is a deficient number, since it is larger than the sum of its proper divisors (28994837).

2021020123 is an equidigital number, since it uses as much as digits as its factorization.

2021020123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83357.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2021020123 is about 44955.7573954660. The cubic root of 2021020123 is about 1264.3196251718.

Adding to 2021020123 its reverse (3210201202), we get a palindrome (5231221325).

The spelling of 2021020123 in words is "two billion, twenty-one million, twenty thousand, one hundred twenty-three".