212021121201111 has 96 divisors (see below), whose sum is σ = 318268404567360. Its totient is φ = 135905288251392.

The previous prime is 212021121201059. The next prime is 212021121201167. The reversal of 212021121201111 is 111102121120212.

It is a happy number.

212021121201111 is a `hidden beast` number, since 2 + 120 + 211 + 21 + 201 + 111 = 666.

212021121201111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212021121201111 - 2³⁰ = 212020047459287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021121201311) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5632399456 + ... + 5632437098.

It is an arithmetic number, because the mean of its divisors is an integer number (3315295880910).

Almost surely, 2^{212021121201111} is an apocalyptic number.

212021121201111 is a deficient number, since it is larger than the sum of its proper divisors (106247283366249).

212021121201111 is a wasteful number, since it uses less digits than its factorization.

212021121201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38465 (or 38462 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 212021121201111 its reverse (111102121120212), we get a palindrome (323123242321323).

The spelling of 212021121201111 in words is "two hundred twelve trillion, twenty-one billion, one hundred twenty-one million, two hundred one thousand, one hundred eleven".