221212234443340 has 96 divisors (see below), whose sum is σ = 563050413717120. Its totient is φ = 71267077668864.

The previous prime is 221212234443331. The next prime is 221212234443353. The reversal of 221212234443340 is 43344432212122.

221212234443340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 221212234443340.

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, 73852705 + ... + 76789624.

It is an arithmetic number, because the mean of its divisors is an integer number (5865108476220).

Almost surely, 2^{221212234443340} is an apocalyptic number.

221212234443340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221212234443340 is an abundant number, since it is smaller than the sum of its proper divisors (341838179273780).

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

221212234443340 is a wasteful number, since it uses less digits than its factorization.

221212234443340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150642979 (or 150642977 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 37.

Adding to 221212234443340 its reverse (43344432212122), we get a palindrome (264556666655462).

The spelling of 221212234443340 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred thirty-four million, four hundred forty-three thousand, three hundred forty".