212121100211011 has 4 divisors (see below), whose sum is σ = 213197857065072. Its totient is φ = 211044343356952.

The previous prime is 212121100211003. The next prime is 212121100211017. The reversal of 212121100211011 is 110112001121212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212121100211011 - 2³ = 212121100211003 is a prime.

It is a super-3 number, since 3×212121100211011³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212121100211017) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 538378426735 + ... + 538378427128.

It is an arithmetic number, because the mean of its divisors is an integer number (53299464266268).

Almost surely, 2^{212121100211011} is an apocalyptic number.

212121100211011 is a deficient number, since it is larger than the sum of its proper divisors (1076756854061).

212121100211011 is a wasteful number, since it uses less digits than its factorization.

212121100211011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076756854060.

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

Adding to 212121100211011 its reverse (110112001121212), we get a palindrome (322233101332223).

The spelling of 212121100211011 in words is "two hundred twelve trillion, one hundred twenty-one billion, one hundred million, two hundred eleven thousand, eleven".