212222200055742 has 160 divisors (see below), whose sum is σ = 506184001092000. Its totient is φ = 66266729856000.

The previous prime is 212222200055729. The next prime is 212222200055809. The reversal of 212222200055742 is 247550002222212.

212222200055742 is a `hidden beast` number, since 2 + 1 + 22 + 22 + 20 + 0 + 0 + 557 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 212222200055697 and 212222200055706.

It is a congruent number.

It is an unprimeable number.

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 79 ways as a sum of consecutive naturals, for example, 236129634 + ... + 237026682.

It is an arithmetic number, because the mean of its divisors is an integer number (3163650006825).

Almost surely, 2^{212222200055742} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212222200055742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253092000546000).

212222200055742 is an abundant number, since it is smaller than the sum of its proper divisors (293961801036258).

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

212222200055742 is a wasteful number, since it uses less digits than its factorization.

212222200055742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897944 (or 897935 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 36.

Adding to 212222200055742 its reverse (247550002222212), we get a palindrome (459772202277954).

The spelling of 212222200055742 in words is "two hundred twelve trillion, two hundred twenty-two billion, two hundred million, fifty-five thousand, seven hundred forty-two".