212111211221002 has 16 divisors (see below), whose sum is σ = 325986929887752. Its totient is φ = 103449852794880.

The previous prime is 212111211220969. The next prime is 212111211221051. The reversal of 212111211221002 is 200122112111212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 197148866622841 + 14962344598161 = 14040971^2 + 3868119^2 .

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 7 ways as a sum of consecutive naturals, for example, 237435543 + ... + 238327210.

Almost surely, 2^{212111211221002} is an apocalyptic number.

212111211221002 is a deficient number, since it is larger than the sum of its proper divisors (113875718666750).

212111211221002 is a wasteful number, since it uses less digits than its factorization.

212111211221002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475768233.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 212111211221002 its reverse (200122112111212), we get a palindrome (412233323332214).

The spelling of 212111211221002 in words is "two hundred twelve trillion, one hundred eleven billion, two hundred eleven million, two hundred twenty-one thousand, two".