212001111010221 has 64 divisors (see below), whose sum is σ = 318560165183232. Its totient is φ = 124532547489792.

The previous prime is 212001111010193. The next prime is 212001111010303. The reversal of 212001111010221 is 122010111100212.

It is a happy number.

It is not a de Polignac number, because 212001111010221 - 2²⁹ = 212000574139309 is a prime.

It is a super-2 number, since 2×212001111010221² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212001111010221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001111010321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1199331781 + ... + 1199508533.

It is an arithmetic number, because the mean of its divisors is an integer number (4977502580988).

Almost surely, 2^{212001111010221} is an apocalyptic number.

It is an amenable number.

212001111010221 is a deficient number, since it is larger than the sum of its proper divisors (106559054173011).

212001111010221 is a wasteful number, since it uses less digits than its factorization.

212001111010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192542.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 212001111010221 its reverse (122010111100212), we get a palindrome (334011222110433).

The spelling of 212001111010221 in words is "two hundred twelve trillion, one billion, one hundred eleven million, ten thousand, two hundred twenty-one".