21002303122 has 16 divisors (see below), whose sum is σ = 33637665600. Its totient is φ = 9810983952.

The previous prime is 21002303117. The next prime is 21002303167. The reversal of 21002303122 is 22130320012.

It is a junction number, because it is equal to n+sod(n) for n = 21002303096 and 21002303105.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5306997 + ... + 5310952.

It is an arithmetic number, because the mean of its divisors is an integer number (2102354100).

Almost surely, 2^21002303122 is an apocalyptic number.

21002303122 is a deficient number, since it is larger than the sum of its proper divisors (12635362478).

21002303122 is a wasteful number, since it uses less digits than its factorization.

21002303122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10618017.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21002303122 its reverse (22130320012), we get a palindrome (43132623134).

The spelling of 21002303122 in words is "twenty-one billion, two million, three hundred three thousand, one hundred twenty-two".