21201201010001 has 8 divisors (see below), whose sum is σ = 21457368737280. Its totient is φ = 20945050701232.

The previous prime is 21201201009953. The next prime is 21201201010091. The reversal of 21201201010001 is 10001010210212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21201201010001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21201201010091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1897265 + ... + 6782478.

It is an arithmetic number, because the mean of its divisors is an integer number (2682171092160).

Almost surely, 2^{21201201010001} is an apocalyptic number.

It is an amenable number.

21201201010001 is a deficient number, since it is larger than the sum of its proper divisors (256167727279).

21201201010001 is an equidigital number, since it uses as much as digits as its factorization.

21201201010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8709255.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21201201010001 its reverse (10001010210212), we get a palindrome (31202211220213).

The spelling of 21201201010001 in words is "twenty-one trillion, two hundred one billion, two hundred one million, ten thousand, one".