201021221001001 has 8 divisors (see below), whose sum is σ = 204076273713408. Its totient is φ = 197972384064000.

The previous prime is 201021221000989. The next prime is 201021221001019. The reversal of 201021221001001 is 100100122120102.

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

It is a cyclic number.

It is not a de Polignac number, because 201021221001001 - 2⁹ = 201021221000489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201021221001061) 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, 1553878680 + ... + 1554008041.

It is an arithmetic number, because the mean of its divisors is an integer number (25509534214176).

Almost surely, 2^{201021221001001} is an apocalyptic number.

It is an amenable number.

201021221001001 is a deficient number, since it is larger than the sum of its proper divisors (3055052712407).

201021221001001 is an equidigital number, since it uses as much as digits as its factorization.

201021221001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3107887703.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201021221001001 its reverse (100100122120102), we get a palindrome (301121343121103).

The spelling of 201021221001001 in words is "two hundred one trillion, twenty-one billion, two hundred twenty-one million, one thousand, one".