210102102020 has 24 divisors (see below), whose sum is σ = 444688548864. Its totient is φ = 83379100896.

The previous prime is 210102102017. The next prime is 210102102097. The reversal of 210102102020 is 20201201012.

It is a happy number.

It is a super-4 number, since 4×210102102020⁴ (a number of 46 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210102101992 and 210102102010.

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, 41356142 + ... + 41361221.

It is an arithmetic number, because the mean of its divisors is an integer number (18528689536).

Almost surely, 2^210102102020 is an apocalyptic number.

210102102020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210102102020 is an abundant number, since it is smaller than the sum of its proper divisors (234586446844).

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

210102102020 is a wasteful number, since it uses less digits than its factorization.

210102102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82717499 (or 82717497 counting only the distinct ones).

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

Adding to 210102102020 its reverse (20201201012), we get a palindrome (230303303032).

The spelling of 210102102020 in words is "two hundred ten billion, one hundred two million, one hundred two thousand, twenty".