212133342440 has 32 divisors (see below), whose sum is σ = 502421076000. Its totient is φ = 80387371584.

The previous prime is 212133342439. The next prime is 212133342511. The reversal of 212133342440 is 44243331212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139560650 + ... + 139562169.

It is an arithmetic number, because the mean of its divisors is an integer number (15700658625).

Almost surely, 2^212133342440 is an apocalyptic number.

212133342440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212133342440 is an abundant number, since it is smaller than the sum of its proper divisors (290287733560).

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

212133342440 is a wasteful number, since it uses less digits than its factorization.

212133342440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279122849 (or 279122845 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 212133342440 its reverse (44243331212), we get a palindrome (256376673652).

The spelling of 212133342440 in words is "two hundred twelve billion, one hundred thirty-three million, three hundred forty-two thousand, four hundred forty".