212331112020 has 192 divisors, whose sum is σ = 663743808000. Its totient is φ = 56351692800.

The previous prime is 212331112009. The next prime is 212331112043. The reversal of 212331112020 is 20211133212.

212331112020 is a `hidden beast` number, since 212 + 3 + 311 + 120 + 20 = 666.

It is a super-2 number, since 2×212331112020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212331111984 and 212331112002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 129706642 + ... + 129708278.

It is an arithmetic number, because the mean of its divisors is an integer number (3456999000).

Almost surely, 2^212331112020 is an apocalyptic number.

212331112020 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 212331112020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331871904000).

212331112020 is an abundant number, since it is smaller than the sum of its proper divisors (451412695980).

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

212331112020 is a wasteful number, since it uses less digits than its factorization.

212331112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655 (or 2647 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 212331112020 its reverse (20211133212), we get a palindrome (232542245232).

The spelling of 212331112020 in words is "two hundred twelve billion, three hundred thirty-one million, one hundred twelve thousand, twenty".