21212011101201 has 8 divisors (see below), whose sum is σ = 28670115461280. Its totient is φ = 13947623737632.

The previous prime is 21212011101199. The next prime is 21212011101209. The reversal of 21212011101201 is 10210111021212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21212011101201 - 2¹ = 21212011101199 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21212011101209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48429248871 + ... + 48429249308.

It is an arithmetic number, because the mean of its divisors is an integer number (3583764432660).

Almost surely, 2^{21212011101201} is an apocalyptic number.

It is an amenable number.

21212011101201 is a deficient number, since it is larger than the sum of its proper divisors (7458104360079).

21212011101201 is an equidigital number, since it uses as much as digits as its factorization.

21212011101201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96858498255.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21212011101201 its reverse (10210111021212), we get a palindrome (31422122122413).

The spelling of 21212011101201 in words is "twenty-one trillion, two hundred twelve billion, eleven million, one hundred one thousand, two hundred one".