21230213122 has 32 divisors (see below), whose sum is σ = 35837942400. Its totient is φ = 9372941568.

The previous prime is 21230213099. The next prime is 21230213129. The reversal of 21230213122 is 22131203212.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 21230213122.

It is not an unprimeable number, because it can be changed into a prime (21230213129) 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, 92997 + ... + 226072.

It is an arithmetic number, because the mean of its divisors is an integer number (1119935700).

Almost surely, 2^21230213122 is an apocalyptic number.

21230213122 is a deficient number, since it is larger than the sum of its proper divisors (14607729278).

21230213122 is a wasteful number, since it uses less digits than its factorization.

21230213122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319210.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21230213122 its reverse (22131203212), we get a palindrome (43361416334).

The spelling of 21230213122 in words is "twenty-one billion, two hundred thirty million, two hundred thirteen thousand, one hundred twenty-two".