21212302011331 has 16 divisors (see below), whose sum is σ = 21624615705600. Its totient is φ = 20803195496160.

The previous prime is 21212302011287. The next prime is 21212302011359. The reversal of 21212302011331 is 13311020321212.

It is a cyclic number.

It is not a de Polignac number, because 21212302011331 - 2⁹ = 21212302010819 is a prime.

It is a super-3 number, since 3×21212302011331³ (a number of 41 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 (21212302111331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56427565 + ... + 56802241.

It is an arithmetic number, because the mean of its divisors is an integer number (1351538481600).

Almost surely, 2^{21212302011331} is an apocalyptic number.

21212302011331 is a deficient number, since it is larger than the sum of its proper divisors (412313694269).

21212302011331 is a wasteful number, since it uses less digits than its factorization.

21212302011331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378954.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21212302011331 its reverse (13311020321212), we get a palindrome (34523322332543).

The spelling of 21212302011331 in words is "twenty-one trillion, two hundred twelve billion, three hundred two million, eleven thousand, three hundred thirty-one".