212111011022201 has 6 divisors (see below), whose sum is σ = 219677396671902. Its totient is φ = 204796838227520.

The previous prime is 212111011022177. The next prime is 212111011022219. The reversal of 212111011022201 is 102220110111212.

It can be written as a sum of positive squares in 3 ways, for example, as 136367718400 + 211974643303801 = 369280^2 + 14559349^2 .

It is not a de Polignac number, because 212111011022201 - 2⁴² = 207712964511097 is a prime.

It is a super-2 number, since 2×212111011022201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212111011022201.

It is not an unprimeable number, because it can be changed into a prime (212111011022231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 126106426640 + ... + 126106428321.

It is an arithmetic number, because the mean of its divisors is an integer number (36612899445317).

Almost surely, 2^{212111011022201} is an apocalyptic number.

It is an amenable number.

212111011022201 is a deficient number, since it is larger than the sum of its proper divisors (7566385649701).

212111011022201 is an equidigital number, since it uses as much as digits as its factorization.

212111011022201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252212855019 (or 252212854990 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 212111011022201 its reverse (102220110111212), we get a palindrome (314331121133413).

The spelling of 212111011022201 in words is "two hundred twelve trillion, one hundred eleven billion, eleven million, twenty-two thousand, two hundred one".