21211213302 has 24 divisors (see below), whose sum is σ = 46035944136. Its totient is φ = 7058355936.

The previous prime is 21211213301. The next prime is 21211213339. The reversal of 21211213302 is 20331211212.

21211213302 is a `hidden beast` number, since 212 + 1 + 121 + 330 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211213301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 993183 + ... + 1014314.

It is an arithmetic number, because the mean of its divisors is an integer number (1918164339).

Almost surely, 2^21211213302 is an apocalyptic number.

21211213302 is an abundant number, since it is smaller than the sum of its proper divisors (24824730834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21211213302 is a wasteful number, since it uses less digits than its factorization.

21211213302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008092 (or 2008089 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21211213302 its reverse (20331211212), we get a palindrome (41542424514).

The spelling of 21211213302 in words is "twenty-one billion, two hundred eleven million, two hundred thirteen thousand, three hundred two".