212001221221011 has 24 divisors (see below), whose sum is σ = 315125559534240. Its totient is φ = 137240917266816.

The previous prime is 212001221221007. The next prime is 212001221221039. The reversal of 212001221221011 is 110122122100212.

212001221221011 is a `hidden beast` number, since 21 + 200 + 1 + 221 + 2 + 210 + 11 = 666.

It is not a de Polignac number, because 212001221221011 - 2² = 212001221221007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212001221221211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 632675746 + ... + 633010743.

It is an arithmetic number, because the mean of its divisors is an integer number (13130231647260).

Almost surely, 2^{212001221221011} is an apocalyptic number.

212001221221011 is a deficient number, since it is larger than the sum of its proper divisors (103124338313229).

212001221221011 is a wasteful number, since it uses less digits than its factorization.

212001221221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265687035 (or 1265687032 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212001221221011 its reverse (110122122100212), we get a palindrome (322123343321223).

The spelling of 212001221221011 in words is "two hundred twelve trillion, one billion, two hundred twenty-one million, two hundred twenty-one thousand, eleven".