21220101333 has 16 divisors (see below), whose sum is σ = 31567641600. Its totient is φ = 14088029760.

The previous prime is 21220101271. The next prime is 21220101367. The reversal of 21220101333 is 33310102212.

21220101333 is a `hidden beast` number, since 212 + 20 + 101 + 333 = 666.

It is not a de Polignac number, because 21220101333 - 2¹⁸ = 21219839189 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220101533) 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, 1624053 + ... + 1637066.

It is an arithmetic number, because the mean of its divisors is an integer number (1972977600).

Almost surely, 2^21220101333 is an apocalyptic number.

It is an amenable number.

21220101333 is a deficient number, since it is larger than the sum of its proper divisors (10347540267).

21220101333 is a wasteful number, since it uses less digits than its factorization.

21220101333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3261369 (or 3261363 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21220101333 its reverse (33310102212), we get a palindrome (54530203545).

The spelling of 21220101333 in words is "twenty-one billion, two hundred twenty million, one hundred one thousand, three hundred thirty-three".