210102021020 has 48 divisors (see below), whose sum is σ = 448208667648. Its totient is φ = 82710830400.

The previous prime is 210102021013. The next prime is 210102021023. The reversal of 210102021020 is 20120201012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 210102020992 and 210102021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210102021023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1406945 + ... + 1549095.

It is an arithmetic number, because the mean of its divisors is an integer number (9337680576).

Almost surely, 2^210102021020 is an apocalyptic number.

210102021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210102021020 is an abundant number, since it is smaller than the sum of its proper divisors (238106646628).

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

210102021020 is a wasteful number, since it uses less digits than its factorization.

210102021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143330 (or 143328 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 210102021020 its reverse (20120201012), we get a palindrome (230222222032).

The spelling of 210102021020 in words is "two hundred ten billion, one hundred two million, twenty-one thousand, twenty".