20210102 has 8 divisors (see below), whose sum is σ = 33071112. Its totient is φ = 9186400.

The previous prime is 20210101. The next prime is 20210107. The reversal of 20210102 is 20101202.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20210102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459299 + ... + 459342.

It is an arithmetic number, because the mean of its divisors is an integer number (4133889).

Almost surely, 2^20210102 is an apocalyptic number.

20210102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20210102 is a deficient number, since it is larger than the sum of its proper divisors (12861010).

20210102 is a wasteful number, since it uses less digits than its factorization.

20210102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918654.

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

The square root of 20210102 is about 4495.5647031268. The cubic root of 20210102 is about 272.3889601738.

Adding to 20210102 its reverse (20101202), we get a palindrome (40311304).

Subtracting from 20210102 its reverse (20101202), we obtain a square (108900 = 330²).

The spelling of 20210102 in words is "twenty million, two hundred ten thousand, one hundred two".