212121010111011 has 8 divisors (see below), whose sum is σ = 283615835247360. Its totient is φ = 141020095857672.

The previous prime is 212121010111009. The next prime is 212121010111037. The reversal of 212121010111011 is 110111010121212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212121010111011 - 2¹ = 212121010111009 is a prime.

It is a super-3 number, since 3×212121010111011³ (a number of 44 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (212121010111511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98477719495 + ... + 98477721648.

It is an arithmetic number, because the mean of its divisors is an integer number (35451979405920).

Almost surely, 2^{212121010111011} is an apocalyptic number.

212121010111011 is a deficient number, since it is larger than the sum of its proper divisors (71494825136349).

212121010111011 is a wasteful number, since it uses less digits than its factorization.

212121010111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196955441505.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 212121010111011 its reverse (110111010121212), we get a palindrome (322232020232223).

The spelling of 212121010111011 in words is "two hundred twelve trillion, one hundred twenty-one billion, ten million, one hundred eleven thousand, eleven".