212111112020 has 24 divisors (see below), whose sum is σ = 449843570568. Its totient is φ = 84004400000.

The previous prime is 212111112013. The next prime is 212111112043. The reversal of 212111112020 is 20211111212.

It can be written as a sum of positive squares in 4 ways, for example, as 41036225476 + 171074886544 = 202574^2 + 413612^2 .

It is a super-2 number, since 2×212111112020² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212111111986 and 212111112004.

It is a congruent number.

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, 52500731 + ... + 52504770.

It is an arithmetic number, because the mean of its divisors is an integer number (18743482107).

Almost surely, 2^212111112020 is an apocalyptic number.

212111112020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212111112020 is an abundant number, since it is smaller than the sum of its proper divisors (237732458548).

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

212111112020 is a wasteful number, since it uses less digits than its factorization.

212111112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105005611 (or 105005609 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212111112020 its reverse (20211111212), we get a palindrome (232322223232).

The spelling of 212111112020 in words is "two hundred twelve billion, one hundred eleven million, one hundred twelve thousand, twenty".