21230213202 has 96 divisors (see below), whose sum is σ = 52382700864. Its totient is φ = 6156777600.

The previous prime is 21230213201. The next prime is 21230213243. The reversal of 21230213202 is 20231203212.

21230213202 is a `hidden beast` number, since 21 + 230 + 213 + 202 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (21230213201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 423133 + ... + 470639.

It is an arithmetic number, because the mean of its divisors is an integer number (545653134).

Almost surely, 2^21230213202 is an apocalyptic number.

21230213202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21230213202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26191350432).

21230213202 is an abundant number, since it is smaller than the sum of its proper divisors (31152487662).

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

21230213202 is a wasteful number, since it uses less digits than its factorization.

21230213202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47624 (or 47621 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21230213202 its reverse (20231203212), we get a palindrome (41461416414).

It can be divided in two parts, 21230 and 213202, that added together give a palindrome (234432).

The spelling of 21230213202 in words is "twenty-one billion, two hundred thirty million, two hundred thirteen thousand, two hundred two".