212012113440 has 192 divisors, whose sum is σ = 691295883264. Its totient is φ = 54574829568.

The previous prime is 212012113429. The next prime is 212012113463. The reversal of 212012113440 is 44311210212.

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, 2208522 + ... + 2302518.

It is an arithmetic number, because the mean of its divisors is an integer number (3600499392).

Almost surely, 2^212012113440 is an apocalyptic number.

212012113440 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 212012113440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345647941632).

212012113440 is an abundant number, since it is smaller than the sum of its proper divisors (479283769824).

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

212012113440 is a wasteful number, since it uses less digits than its factorization.

212012113440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94179 (or 94171 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 212012113440 its reverse (44311210212), we get a palindrome (256323323652).

The spelling of 212012113440 in words is "two hundred twelve billion, twelve million, one hundred thirteen thousand, four hundred forty".