2021010102 has 24 divisors (see below), whose sum is σ = 4541036136. Its totient is φ = 673669872.

The previous prime is 2021010091. The next prime is 2021010109. The reversal of 2021010102 is 2010101202.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021010109) 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 11 ways as a sum of consecutive naturals, for example, 2078743 + ... + 2079714.

It is an arithmetic number, because the mean of its divisors is an integer number (189209839).

Almost surely, 2^2021010102 is an apocalyptic number.

2021010102 is an abundant number, since it is smaller than the sum of its proper divisors (2520026034).

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

2021010102 is an equidigital number, since it uses as much as digits as its factorization.

2021010102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4158474 (or 4158462 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2021010102 is about 44955.6459413053. The cubic root of 2021010102 is about 1264.3175355064.

Adding to 2021010102 its reverse (2010101202), we get a palindrome (4031111304).

The spelling of 2021010102 in words is "two billion, twenty-one million, ten thousand, one hundred two".