212222142543450 has 192 divisors, whose sum is σ = 567694308988800. Its totient is φ = 52156563379200.

The previous prime is 212222142543373. The next prime is 212222142543457. The reversal of 212222142543450 is 54345241222212.

It is a happy number.

It is a super-3 number, since 3×212222142543450³ (a number of 44 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 212222142543399 and 212222142543408.

It is not an unprimeable number, because it can be changed into a prime (212222142543457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11653504845 + ... + 11653523055.

It is an arithmetic number, because the mean of its divisors is an integer number (2956741192650).

Almost surely, 2^{212222142543450} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212222142543450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283847154494400).

212222142543450 is an abundant number, since it is smaller than the sum of its proper divisors (355472166445350).

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

212222142543450 is a wasteful number, since it uses less digits than its factorization.

212222142543450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27377 (or 27372 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 39.

Adding to 212222142543450 its reverse (54345241222212), we get a palindrome (266567383765662).

The spelling of 212222142543450 in words is "two hundred twelve trillion, two hundred twenty-two billion, one hundred forty-two million, five hundred forty-three thousand, four hundred fifty".