21212041311 has 24 divisors (see below), whose sum is σ = 31007162784. Its totient is φ = 13972305600.

The previous prime is 21212041289. The next prime is 21212041321. The reversal of 21212041311 is 11314021212.

It is not a de Polignac number, because 21212041311 - 2¹¹ = 21212039263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212041321) 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, 418725 + ... + 466641.

It is an arithmetic number, because the mean of its divisors is an integer number (1291965116).

Almost surely, 2^21212041311 is an apocalyptic number.

21212041311 is a deficient number, since it is larger than the sum of its proper divisors (9795121473).

21212041311 is a wasteful number, since it uses less digits than its factorization.

21212041311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48511 (or 48508 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21212041311 its reverse (11314021212), we get a palindrome (32526062523).

The spelling of 21212041311 in words is "twenty-one billion, two hundred twelve million, forty-one thousand, three hundred eleven".