212101012020 has 96 divisors (see below), whose sum is σ = 603585714816. Its totient is φ = 55643328000.

The previous prime is 212101012007. The next prime is 212101012037. The reversal of 212101012020 is 20210101212.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 212101011987 and 212101012005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 839955 + ... + 1062885.

It is an arithmetic number, because the mean of its divisors is an integer number (6287351196).

Almost surely, 2^212101012020 is an apocalyptic number.

212101012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212101012020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301792857408).

212101012020 is an abundant number, since it is smaller than the sum of its proper divisors (391484702796).

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

212101012020 is a wasteful number, since it uses less digits than its factorization.

212101012020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223201 (or 223199 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 212101012020 its reverse (20210101212), we get a palindrome (232311113232).

The spelling of 212101012020 in words is "two hundred twelve billion, one hundred one million, twelve thousand, twenty".