21012021021201 has 8 divisors (see below), whose sum is σ = 32018317746624. Its totient is φ = 12006869154960.

The previous prime is 21012021021193. The next prime is 21012021021217. The reversal of 21012021021201 is 10212012021012.

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

It is not a de Polignac number, because 21012021021201 - 2³ = 21012021021193 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21012021021241) 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, 500286214770 + ... + 500286214811.

It is an arithmetic number, because the mean of its divisors is an integer number (4002289718328).

Almost surely, 2^{21012021021201} is an apocalyptic number.

21012021021201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21012021021201 is a deficient number, since it is larger than the sum of its proper divisors (11006296725423).

21012021021201 is a wasteful number, since it uses less digits than its factorization.

21012021021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000572429591.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21012021021201 its reverse (10212012021012), we get a palindrome (31224033042213).

The spelling of 21012021021201 in words is "twenty-one trillion, twelve billion, twenty-one million, twenty-one thousand, two hundred one".