21212323212201 has 32 divisors (see below), whose sum is σ = 31297045165056. Its totient is φ = 12672592920000.

The previous prime is 21212323212191. The next prime is 21212323212211. The reversal of 21212323212201 is 10221232321212.

It is an interprime number because it is at equal distance from previous prime (21212323212191) and next prime (21212323212211).

It is not a de Polignac number, because 21212323212201 - 2⁹ = 21212323211689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21212323212211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13261765 + ... + 14774946.

It is an arithmetic number, because the mean of its divisors is an integer number (978032661408).

Almost surely, 2^{21212323212201} is an apocalyptic number.

It is an amenable number.

21212323212201 is a deficient number, since it is larger than the sum of its proper divisors (10084721952855).

21212323212201 is a wasteful number, since it uses less digits than its factorization.

21212323212201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28037053.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21212323212201 its reverse (10221232321212), we get a palindrome (31433555533413).

The spelling of 21212323212201 in words is "twenty-one trillion, two hundred twelve billion, three hundred twenty-three million, two hundred twelve thousand, two hundred one".