212403304212 has 144 divisors (see below), whose sum is σ = 549222762816. Its totient is φ = 63360128000.

The previous prime is 212403304207. The next prime is 212403304231.

It is a happy number.

212403304212 is nontrivially palindromic in base 10.

It is a super-4 number, since 4×212403304212⁴ (a number of 46 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 313741618 + ... + 313742294.

It is an arithmetic number, because the mean of its divisors is an integer number (3814046964).

Almost surely, 2^212403304212 is an apocalyptic number.

212403304212 is a gapful number since it is divisible by the number (22) 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 212403304212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274611381408).

212403304212 is an abundant number, since it is smaller than the sum of its proper divisors (336819458604).

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

212403304212 is a wasteful number, since it uses less digits than its factorization.

212403304212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130 (or 1027 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

It can be divided in two parts, 212403 and 304212, that added together give a palindrome (516615).

The spelling of 212403304212 in words is "two hundred twelve billion, four hundred three million, three hundred four thousand, two hundred twelve".