21212003011311 has 48 divisors (see below), whose sum is σ = 35754430233600. Its totient is φ = 12113286287760.

The previous prime is 21212003011307. The next prime is 21212003011321. The reversal of 21212003011311 is 11311030021212.

21212003011311 is a `hidden beast` number, since 2 + 121 + 200 + 30 + 1 + 1 + 311 = 666.

It is not a de Polignac number, because 21212003011311 - 2² = 21212003011307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212003011321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2536606 + ... + 6989876.

It is an arithmetic number, because the mean of its divisors is an integer number (744883963200).

Almost surely, 2^{21212003011311} is an apocalyptic number.

21212003011311 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21212003011311 is a deficient number, since it is larger than the sum of its proper divisors (14542427222289).

21212003011311 is a wasteful number, since it uses less digits than its factorization.

21212003011311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4454841 (or 4454824 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21212003011311 its reverse (11311030021212), we get a palindrome (32523033032523).

The spelling of 21212003011311 in words is "twenty-one trillion, two hundred twelve billion, three million, eleven thousand, three hundred eleven".