21210020221311 has 16 divisors (see below), whose sum is σ = 31733363591520. Its totient is φ = 14000013345600.

The previous prime is 21210020221303. The next prime is 21210020221333. The reversal of 21210020221311 is 11312202001212.

21210020221311 is a `hidden beast` number, since 2 + 12 + 100 + 20 + 221 + 311 = 666.

It is not a de Polignac number, because 21210020221311 - 2³ = 21210020221303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210020271311) 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, 3888889870 + ... + 3888895323.

It is an arithmetic number, because the mean of its divisors is an integer number (1983335224470).

Almost surely, 2^{21210020221311} is an apocalyptic number.

21210020221311 is a deficient number, since it is larger than the sum of its proper divisors (10523343370209).

21210020221311 is a wasteful number, since it uses less digits than its factorization.

21210020221311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7777785303 (or 7777785297 counting only the distinct ones).

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

Adding to 21210020221311 its reverse (11312202001212), we get a palindrome (32522222222523).

The spelling of 21210020221311 in words is "twenty-one trillion, two hundred ten billion, twenty million, two hundred twenty-one thousand, three hundred eleven".