2021002120 has 32 divisors (see below), whose sum is σ = 4577382720. Its totient is φ = 803044800.

The previous prime is 2021002097. The next prime is 2021002169. The reversal of 2021002120 is 212001202.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 2021002097 and 2021002106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161262 + ... + 173341.

It is an arithmetic number, because the mean of its divisors is an integer number (143043210).

Almost surely, 2^2021002120 is an apocalyptic number.

2021002120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021002120 is an abundant number, since it is smaller than the sum of its proper divisors (2556380600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021002120 is a wasteful number, since it uses less digits than its factorization.

2021002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334765 (or 334761 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2021002120 is about 44955.5571648267. The cubic root of 2021002120 is about 1264.3158710259.

Adding to 2021002120 its reverse (212001202), we get a palindrome (2233003322).

The spelling of 2021002120 in words is "two billion, twenty-one million, two thousand, one hundred twenty".