21212321123302 has 16 divisors (see below), whose sum is σ = 33522237849600. Its totient is φ = 10039211814600.

The previous prime is 21212321123297. The next prime is 21212321123333. The reversal of 21212321123302 is 20332112321212.

It is a super-3 number, since 3×21212321123302³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242449302 + ... + 242536777.

It is an arithmetic number, because the mean of its divisors is an integer number (2095139865600).

Almost surely, 2^{21212321123302} is an apocalyptic number.

21212321123302 is a deficient number, since it is larger than the sum of its proper divisors (12309916726298).

21212321123302 is a wasteful number, since it uses less digits than its factorization.

21212321123302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484987251.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21212321123302 its reverse (20332112321212), we get a palindrome (41544433444514).

The spelling of 21212321123302 in words is "twenty-one trillion, two hundred twelve billion, three hundred twenty-one million, one hundred twenty-three thousand, three hundred two".